Graphic technology -- Input data for characterization of 4-colour process printing

This document defines a data set of ink value combinations that can be used to characterize four-colour process printing. This data set is not optimized for any printing process or application area but is robust enough for all general applications. While it is primarily aimed at process colour printing with CMYK inks, it can also be used with any combination of three chromatic inks and a dark ink. This document is an alternative to the ISO 12642‑2 data set where more neutral scale data are desired. It is not designed as a replacement for ISO 12642-2.

Technologie graphique -- Données d'entrée pour caractérisation d'impression en quadrichromie

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Published
Publication Date
29-Sep-2021
Current Stage
5060 - Close of voting Proof returned by Secretariat
Start Date
17-Aug-2021
Completion Date
16-Aug-2021
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INTERNATIONAL ISO
STANDARD 12642-3
First edition
2021-09
Graphic technology — Input data for
characterization of 4-colour process
printing —
Part 3:
Extended data set including near
neutral scale
Reference number
ISO 12642-3:2021(E)
ISO 2021
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ISO 12642-3:2021(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2021

All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may

be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting

on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address

below or ISO’s member body in the country of the requester.
ISO copyright office
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CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2021 – All rights reserved
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ISO 12642-3:2021(E)
Contents Page

Foreword ........................................................................................................................................................................................................................................iv

Introduction ..................................................................................................................................................................................................................................v

1 Scope ................................................................................................................................................................................................................................. 1

2 Normative references ...................................................................................................................................................................................... 1

3 Terms and definitions ..................................................................................................................................................................................... 1

4 Technical requirements ................................................................................................................................................................................ 2

4.1 Background ................................................................................................................................................................................................ 2

4.2 Tone value precision .......................................................................................................................................................................... 2

4.3 Data set definition ................................................................................................................................................................................ 2

4.4 Layouts for printing ............................................................................................................................................................................ 4

4.5 Compatibility with data based on the ISO 12642-2 target ............................................................................... 5

Annex A (informative) Example layout and image file ....................................................................................................................... 6

Annex B (informative) ID and ink values of the ISO 12647-3 data set............................................................................... 8

Bibliography .............................................................................................................................................................................................................................45

© ISO 2021 – All rights reserved iii
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ISO 12642-3:2021(E)
Foreword

ISO (the International Organization for Standardization) is a worldwide federation of national standards

bodies (ISO member bodies). The work of preparing International Standards is normally carried out

through ISO technical committees. Each member body interested in a subject for which a technical

committee has been established has the right to be represented on that committee. International

organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.

ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of

electrotechnical standardization.

The procedures used to develop this document and those intended for its further maintenance are

described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the

different types of ISO documents should be noted. This document was drafted in accordance with the

editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/ directives).

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of

any patent rights identified during the development of the document will be in the Introduction and/or

on the ISO list of patent declarations received (see www .iso .org/ patents).

Any trade name used in this document is information given for the convenience of users and does not

constitute an endorsement.

For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and

expressions related to conformity assessment, as well as information about ISO's adherence to the

World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT), see www .iso .org/

iso/ foreword .html.

This document was prepared by Technical Committee ISO/TC 130, Graphic technology.

A list of all parts in the ISO 12642 series can be found on the ISO website.

Any feedback or questions on this document should be directed to the user’s national standards body. A

complete listing of these bodies can be found at www .iso .org/ members .html.
iv © ISO 2021 – All rights reserved
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ISO 12642-3:2021(E)
Introduction

The characterization target ink value combinations defined in ISO 12642-2, have proven very effective

for use in characterizing various printing processes. When the ISO 12642-2 and its predecessor the

ISO 12642-1 target were introduced, there was a need for a visual layout and manual reading of the

target. This led to the need to have some ink value combinations repeated in both single-colour scales

and in various overprint combinations. This resulted in 29 duplicate patches in the ISO 12642-2 data

sets.

Although a totally revised and/or expanded target has been proposed at various times, the size of the

existing ISO 12642-2 target and its patch size have been accepted by the industry and most scanning

spectrophotometers contain drivers that accept this format. This led to the decision that the most useful

way forward was to simply replace the duplicate patches with new ink value combinations. Because of

the increased use of neutral scale calibration, it was felt that these patches would be more useful as

additional black only patches and near-neutrals. The ISO 12642-3 target described in this document

represents the implementation of these proposals. Some of the removed patches were used in other

systems, while duplicate patches were used to verify consistency. The use of multiple targets, averaged

measurements and printing of targets along with the ISO 12642-3 are processes that can be used for

the capture of the desired data.

There is no required layout or patch size defined for this data set. Users are free to randomize the layout

and/or “fit” it to the space available. However, the members of the graphic arts community believe

strongly that an example layout should be provided as a guide to the user. Because of the removal

of the 29 patches that “filled out” the symmetrical colour layout, no “visual” layout is provided. One

randomized example layout is provided.

The needs of publication, commercial, and package printing with offset lithography, gravure,

flexography, and other printing processes have been considered.
© ISO 2021 – All rights reserved v
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INTERNATIONAL STANDARD ISO 12642-3:2021(E)
Graphic technology — Input data for characterization of
4-colour process printing —
Part 3:
Extended data set including near neutral scale
1 Scope

This document defines a data set of ink value combinations that can be used to characterize four-colour

process printing. This data set is not optimized for any printing process or application area but is robust

enough for all general applications. While it is primarily aimed at process colour printing with CMYK

inks, it can also be used with any combination of three chromatic inks and a dark ink.

This document is an alternative to the ISO 12642-2 data set where more neutral scale data are desired.

It is not designed as a replacement for ISO 12642-2.
2 Normative references

The following documents are referred to in the text in such a way that some or all of their content

constitutes requirements of this document. For dated references, only the edition cited applies. For

undated references, the latest edition of the referenced document (including any amendments) applies.

ISO 12642-2, Graphic technology — Input data for characterization of 4-colour process printing — Part 2:

Expanded data set
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/
3.1
data set
total collection of independently identified ink value sets

Note 1 to entry: The terms “patch” and “target” are deliberately avoided because they imply a physical object or

layout. This document only defines the data values that users are free to arrange in any target layout that meets

their needs, using patches of any size compatible with their measuring equipment.

3.2
ink values

digital value that represents the amount of a colorant required in a rendering process, which, for the

halftone printing process, is equivalent to the tone value/dot area expressed as a percentage

3.3
ink value set

set of four ink values (3.2) representing the amount of the four colours to be used in a process colour

area
© ISO 2021 – All rights reserved 1
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ISO 12642-3:2021(E)
4 Technical requirements
4.1 Background

The technical requirements and data set definitions that apply to the data set elements of this document

shall be in accordance with ISO 12642-2.

The key additional requirement that has been identified by the users of the existing target is the need

for more black and near-neutral combinations of C, M, Y ink values. In addition, the use of the visual

layout of the target has diminished with the increased use of automated scanning spectrophotometers.

These two factors have allowed the 29 duplicate ink value sets (patches) to be removed and replaced

with 29 new ink value sets (patches) to improve CMY neutral (23 samples) and K-only (6 samples)

aspects of printing characterization and profile computation.
4.2 Tone value precision

The tone values listed in this document are expressed as whole integer percentages, except for magenta

and yellow in the CMY grey scale, which are rounded to one decimal place from the grey balance

[2]
formulae in CGATS TR 015 , as shown in Formula (1).
−−42 53
MY == 0,,747 04CC−× 100 10 +× 2,940 10 C (1)
This precision can be important in very light grey patches between 0 and 20 %.

Many commercial ICC profiling software generates printable target images from the supplied ISO 28178

text files with 8 bit-per channel precision, which is adequate for most purposes. Printable targets are

available that have an precision of 16 bits per channel (when integrated by a 3 mm spectrophotometer

aperture) thanks to the use of LSB error diffusion when the original 16 bit images were flattened to

8 bits. This is the approach taken in the example target in Annex A.
4.3 Data set definition

Table 1 lists the ink value sets that have been deleted from the ISO 12642-2 target and shows the IDs of

the retained patches with identical values.
2 © ISO 2021 – All rights reserved
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ISO 12642-3:2021(E)
Table 1 — Deleted patches and retained equivalents
Deleted Equivalent C M Y K
1287 73 100 0 0 0
1291 64 85 0 0 0
1294 55 70 0 0 0
1297 37 40 0 0 0
1298 28 30 0 0 0
1300 19 20 0 0 0
1302 10 10 0 0 0
1307 9 0 100 0 0
1311 8 0 85 0 0
1314 7 0 70 0 0
1317 5 0 40 0 0
1318 4 0 30 0 0
1320 3 0 20 0 0
1322 2 0 10 0 0
1327 649 0 0 100 0
1331 568 0 0 85 0
1334 487 0 0 70 0
1337 325 0 0 40 0
1338 244 0 0 30 0
1340 163 0 0 20 0
1342 82 0 0 10 0
1347 1260 0 0 0 100
1352 1096 0 0 0 80
1355 1071 0 0 0 60
1357 946 0 0 0 40
1360 730 0 0 0 20
1367 1 0 0 0 0
1368 647 100 85 85 0
1486 1362 0 0 0 10

The new ink value combinations have been assigned ID numbers 1618 through 1646 as shown in

Table 2.
© ISO 2021 – All rights reserved 3
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ISO 12642-3:2021(E)
Table 2 — New INK value combinations and their IDs
ID C M Y K
1618 25,0 18,9 18,9 0,0
1619 20,0 15,0 15,0 0,0
1620 15,0 11,2 11,2 0,0
1621 10,0 7,5 7,5 0,0
1622 8,0 6,0 6,0 0,0
1623 6,0 4,5 4,5 0,0
1624 4,0 3,0 3,0 0,0
1625 65,0 54,9 54,9 0,0
1626 60,0 49,7 49,7 0,0
1627 55,0 44,7 44,7 0,0
1628 45,0 35,5 35,5 0,0
1629 40,0 31,1 31,1 0,0
1630 35,0 26,9 26,9 0,0
1631 30,0 22,8 22,8 0,0
1632 0,0 0,0 0,0 4,0
1633 95,0 92,5 92,5 0,0
1634 90,0 85,3 85,3 0,0
1635 85,0 78,6 78,6 0,0
1636 80,0 72,2 72,2 0,0
1637 75,0 66,1 66,1 0,0
1638 70,0 60,4 60,4 0,0
1639 0,0 0,0 0,0 65,0
1640 0,0 0,0 0,0 55,0
1641 0,0 0,0 0,0 45,0
1642 0,0 0,0 0,0 35,0
1643 0,0 0,0 0,0 8,0
1644 2,0 1,5 1,5 0,0
1645 98,0 96,9 96,9 0,0
1646 0,0 0,0 0,0 6,0

The accompanying files, available from https:// standards .iso .org/ iso/ 12642/ -3/ ed -1/ en, shall represent

a complete listing of the ink value combinations and their assigned ID numbers that constitute

the ISO 12642-3 characterization data set. Information about the relationship of this data set and

ISO 12642-2 can be found in Annex B.
4.4 Layouts for printing

The ink value sets of this document may be printed in any arrangement desired. Any arrangement shall

include all 1617 ink value sets and shall include a reference to this document to be a valid ISO 12642-3

data set.

For any specific arrangement, a table defining the relationship between position (typically row-column)

and ID number shall be provided.

One example layout is shown in Annex A along with their layout data and image files.

4 © ISO 2021 – All rights reserved
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ISO 12642-3:2021(E)
4.5 Compatibility with data based on the ISO 12642-2 target

Where it is necessary to compare data to earlier data generated with the ISO 12642-2 target, the ID

values of the deleted and equivalent ink value sets in Table 1 can be used to recreate a full ISO 12642-2

data set.
© ISO 2021 – All rights reserved 5
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ISO 12642-3:2021(E)
Annex A
(informative)
Example layout and image file
A.1 General

Although there is no requirement that any particular arrangement of these data be used for printing

characterization targets, it was felt that for many users an example layout was desirable to facilitate

use of the target and familiarize the user with the placement of the neutral ramps. Accordingly, one

example layout is provided along with a caution on the layout of the grey ramps in any target design.

A.2 Design

Unlike ISO 12642-2, ISO 12642-3 should only be used in randomized layouts (this is why there is no

“visual” example), however the CMY and K-only grey patches should not be randomized, but rather

arranged as two contiguous grey ramps along the edge of the target. This helps reduce small tonality

or colour variations throughout the grey ramps due to in-line ink starvation effects or uneven inking

that would be magnified if the grey patches were randomized throughout the target. Target orientation

should be positioned to best optimize grey ramp in line with print technology.
A.3 Layout and cross reference data

The file 12642-3_ID_and_Layout_Crossreference.xls provides a table of the ISO 12642-3 IDs and ink

value data sets as well as a sort index as row column identification for the example layouts.

Figure A.1 shows a reduced size image of the example layout.
Image files for example layout 12642-3-DH include both TIFF and PDF formats.

These files are available for download here: https:// standards .iso .org/ iso/ 12642/ -3/ ed -1/ en/ .

6 © ISO 2021 – All rights reserved
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ISO 12642-3:2021(E)
Figure A.1 — 12642-3-DH
© ISO 2021 – All rights reserved 7
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ISO 12642-3:2021(E)
Annex B
(informative)
ID and ink values of the ISO 12647-3 data set

Table B.1 shows the corresponding ID and ink values of the ISO 12647-3 data set. The ID’s are not

contiguous as the duplicate values from the ISO 12647-2 data set have been removed with the new

neutral patches are seen from ID’s 1618 to 1646.
Table B.1 — ISO 12642-3 Target definition
ID C M Y K
1 0,0 0,0 0,0 0,0
2 0,0 10,0 0,0 0,0
3 0,0 20,0 0,0 0,0
4 0,0 30,0 0,0 0,0
5 0,0 40,0 0,0 0,0
6 0,0 55,0 0,0 0,0
7 0,0 70,0 0,0 0,0
8 0,0 85,0 0,0 0,0
9 0,0 100,0 0,0 0,0
10 10,0 0,0 0,0 0,0
11 10,0 10,0 0,0 0,0
12 10,0 20,0 0,0 0,0
13 10,0 30,0 0,0 0,0
14 10,0 40,0 0,0 0,0
15 10,0 55,0 0,0 0,0
16 10,0 70,0 0,0 0,0
17 10,0 85,0 0,0 0,0
18 10,0 100,0 0,0 0,0
19 20,0 0,0 0,0 0,0
20 20,0 10,0 0,0 0,0
21 20,0 20,0 0,0 0,0
22 20,0 30,0 0,0 0,0
23 20,0 40,0 0,0 0,0
24 20,0 55,0 0,0 0,0
25 20,0 70,0 0,0 0,0
26 20,0 85,0 0,0 0,0
27 20,0 100,0 0,0 0,0
28 30,0 0,0 0,0 0,0
29 30,0 10,0 0,0 0,0
30 30,0 20,0 0,0 0,0
31 30,0 30,0 0,0 0,0
32 30,0 40,0 0,0 0,0
33 30,0 55,0 0,0 0,0
8 © ISO 2021 – All rights reserved
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ISO 12642-3:2021(E)
Table B.1 (continued)
ID C M Y K
34 30,0 70,0 0,0 0,0
35 30,0 85,0 0,0 0,0
36 30,0 100,0 0,0 0,0
37 40,0 0,0 0,0 0,0
38 40,0 10,0 0,0 0,0
39 40,0 20,0 0,0 0,0
40 40,0 30,0 0,0 0,0
41 40,0 40,0 0,0 0,0
42 40,0 55,0 0,0 0,0
43 40,0 70,0 0,0 0,0
44 40,0 85,0 0,0 0,0
45 40,0 100,0 0,0 0,0
46 55,0 0,0 0,0 0,0
47 55,0 10,0 0,0 0,0
48 55,0 20,0 0,0 0,0
49 55,0 30,0 0,0 0,0
50 55,0 40,0 0,0 0,0
51 55,0 55,0 0,0 0,0
52 55,0 70,0 0,0 0,0
53 55,0 85,0 0,0 0,0
54 55,0 100,0 0,0 0,0
55 70,0 0,0 0,0 0,0
56 70,0 10,0 0,0 0,0
57 70,0 20,0 0,0 0,0
58 70,0 30,0 0,0 0,0
59 70,0 40,0 0,0 0,0
60 70,0 55,0 0,0 0,0
61 70,0 70,0 0,0 0,0
62 70,0 85,0 0,0 0,0
63 70,0 100,0 0,0 0,0
64 85,0 0,0 0,0 0,0
65 85,0 10,0 0,0 0,0
66 85,0 20,0 0,0 0,0
67 85,0 30,0 0,0 0,0
68 85,0 40,0 0,0 0,0
69 85,0 55,0 0,0 0,0
70 85,0 70,0 0,0 0,0
71 85,0 85,0 0,0 0,0
72 85,0 100,0 0,0 0,0
73 100,0 0,0 0,0 0,0
74 100,0 10,0 0,0 0,0
75 100,0 20,0 0,0 0,0
76 100,0 30,0 0,0 0,0
77 100,0 40,0 0,0 0,0
© ISO 2021 – All rights reserved 9
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ISO 12642-3:2021(E)
Table B.1 (continued)
ID C M Y K
78 100,0 55,0 0,0 0,0
79 100,0 70,0 0,0 0,0
80 100,0 85,0 0,0 0,0
81 100,0 100,0 0,0 0,0
82 0,0 0,0 10,0 0,0
83 0,0 10,0 10,0 0,0
84 0,0 20,0 10,0 0,0
85 0,0 30,0 10,0 0,0
86 0,0 40,0 10,0 0,0
87 0,0 55,0 10,0 0,0
88 0,0 70,0 10,0 0,0
89 0,0 85,0 10,0 0,0
90 0,0 100,0 10,0 0,0
91 10,0 0,0 10,0 0,0
92 10,0 10,0 10,0 0,0
93 10,0 20,0 10,0 0,0
94 10,0 30,0 10,0 0,0
95 10,0 40,0 10,0 0,0
96 10,0 55,0 10,0 0,0
97 10,0 70,0 10,0 0,0
98 10,0 85,0 10,0 0,0
99 10,0 100,0 10,0 0,0
100 20,0 0,0 10,0 0,0
101 20,0 10,0 10,0 0,0
102 20,0 20,0 10,0 0,0
103 20,0 30,0 10,0 0,0
104 20,0 40,0 10,0 0,0
105 20,0 55,0 10,0 0,0
106 20,0 70,0 10,0 0,0
107 20,0 85,0 10,0 0,0
108 20,0 100,0 10,0 0,0
109 30,0 0,0 10,0 0,0
110 30,0 10,0 10,0 0,0
111 30,0 20,0 10,0 0,0
112 30,0 30,0 10,0 0,0
113 30,0 40,0 10,0 0,0
114 30,0 55,0 10,0 0,0
115 30,0 70,0 10,0 0,0
116 30,0 85,0 10,0 0,0
117 30,0 100,0 10,0 0,0
118 40,0 0,0 10,0 0,0
119 40,0 10,0 10,0 0,0
120 40,0 20,0 10,0 0,0
121 40,0 30,0 10,0 0,0
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ISO 12642-3:2021(E)
Table B.1 (continued)
ID C M Y K
122 40,0 40,0 10,0 0,0
123 40,0 55,0 10,0 0,0
124 40,0 70,0 10,0 0,0
125 40,0 85,0 10,0 0,0
126 40,0 100,0 10,0 0,0
127 55,0 0,0 10,0 0,0
128 55,0 10,0 10,0 0,0
129 55,0 20,0 10,0 0,0
130 55,0 30,0 10,0 0,0
131 55,0 40,0 10,0 0,0
132 55,0 55,0 10,0 0,0
133 55,0 70,0 10,0 0,0
134 55,0 85,0 10,0 0,0
135 55,0 100,0 10,0 0,0
136 70,0 0,0 10,0 0,0
137 70,0 10,0 10,0 0,0
138 70,0 20,0 10,0 0,0
139 70,0 30,0 10,0 0,0
140 70,0 40,0 10,0 0,0
141 70,0 55,0 10,0 0,0
142 70,0 70,0 10,0 0,0
143 70,0 85,0 10,0 0,0
144 70,0 100,0 10,0 0,0
145 85,0 0,0 10,0 0,0
146 85,0 10,0 10,0 0,0
147 85,0 20,0 10,0 0,0
148 85,0 30,0 10,0 0,0
149 85,0 40,0 10,0 0,0
150 85,0 55,0 10,0 0,0
151 85,0 70,0 10,0 0,0
152 85,0 85,0 10,0 0,0
153 85,0 100,0 10,0 0,0
154 100,0 0,0 10,0 0,0
155 100,0 10,0 10,0 0,0
156 100,0 20,0 10,0 0,0
157 100,0 30,0 10,0 0,0
158 100,0 40,0 10,0 0,0
159 100,0 55,0 10,0 0,0
160 100,0 70,0 10,0 0,0
161 100,0 85,0 10,0 0,0
162 100,0 100,0 10,0 0,0
163 0,0 0,0 20,0 0,0
164 0,0 10,0 20,0 0,0
165 0,0 20,0 20,0 0,0
© ISO 2021 – All rights reserved 11
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ISO 12642-3:2021(E)
Table B.1 (continued)
ID C M Y K
166 0,0 30,0 20,0 0,0
167 0,0 40,0 20,0 0,0
168 0,0 55,0 20,0 0,0
169 0,0 70,0 20,0 0,0
170 0,0 85,0 20,0 0,0
171 0,0 100,0 20,0 0,0
172 10,0 0,0 20,0 0,0
173 10,0 10,0 20,0 0,0
174 10,0 20,0 20,0 0,0
175 10,0 30,0 20,0 0,0
176 10,0 40,0 20,0 0,0
177 10,0 55,0 20,0 0,0
178 10,0 70,0 20,0 0,0
179 10,0 85,0 20,0 0,0
180 10,0 100,0 20,0 0,0
181 20,0 0,0 20,0 0,0
182 20,0 10,0 20,0 0,0
183 20,0 20,0 20,0 0,0
184 20,0 30,0 20,0 0,0
185 20,0 40,0 20,0 0,0
186 20,0 55,0 20,0 0,0
187 20,0 70,0 20,0 0,0
188 20,0 85,0 20,0 0,0
189 20,0 100,0 20,0 0,0
190 30,0 0,0 20,0 0,0
191 30,0 10,0 20,0 0,0
192 30,0 20,0 20,0 0,0
193 30,0 30,0 20,0 0,0
194 30,0 40,0 20,0 0,0
195 30,0 55,0 20,0 0,0
196 30,0 70,0 20,0 0,0
197 30,0 85,0 20,0 0,0
198 30,0 100,0 20,0 0,0
199 40,0 0,0 20,0 0,0
200 40,0 10,0 20,0 0,0
201 40,0 20,0 20,0 0,0
202 40,0 30,0 20,0 0,0
203 40,0 40,0 20,0 0,0
204 40,0 55,0 20,0 0,0
205 40,0 70,0 20,0 0,0
206 40,0 85,0 20,0 0,0
207 40,0 100,0 20,0 0,0
208 55,0 0,0 20,0 0,0
209 55,0 10,0 20,0 0,0
12 © ISO 2021 – All rights reserved
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ISO 12642-3:2021(E)
Table B.1 (continued)
ID C M Y K
210 55,0 20,0 20,0 0,0
211 55,0 30,0 20,0 0,0
212 55,0 40,0 20,0 0,0
213 55,0 55,0 20,0 0,0
214 55,0 70,0 20,0 0,0
215 55,0 85,0 20,0 0,0
216 55,0 100,0 20,0 0,0
217 70,0 0,0 20,0 0,0
218 70,0 10,0 20,0 0,0
219 70,0 20,0 20,0 0,0
220 70,0 30,0 20,0 0,0
221 70,0 40,0 20,0 0,0
222 70,0 55,0 20,0 0,0
223 70,0 70,0 20,0 0,0
224 70,0 85,0 20,0 0,0
225 70,0 100,0 20,0 0,0
226 85,0 0,0 20,0 0,0
227 85,0 10,0 20,0 0,0
228 85,0 20,0 20,0 0,0
229 85,0 30,0 20,0 0,0
230 85,0 40,0 20,0 0,0
231 85,0 55,0 20,0 0,0
232 85,0 70,0 20,0 0,0
233 85,0 85,0 20,0 0,0
234 85,0 100,0 20,0 0,0
235 100,0 0,0 20,0 0,0
236 100,0 10,0 20,0 0,0
237 100,0 20,0 20,0 0,0
238 100,0 30,0 20,0 0,0
239 100,0 40,0 20,0 0,0
240 100,0 55,0 20,0 0,0
241 100,0 70,0 20,0 0,0
242 100,0 85,0 20,0 0,0
243 100,0 100,0 20,0 0,0
244 0,0 0,0 30,0 0,0
245 0,0 10,0 30,0 0,0
246 0,0 20,0 30,0 0,0
247 0,0 30,0 30,0 0,0
248 0,0 40,0 30,0 0,0
249 0,0 55,0 30,0 0,0
250 0,0 70,0 30,0 0,0
251 0,0 85,0 30,0 0,0
252 0,0 100,0 30,0 0,0
253 10,0 0,0 30,0 0,0
© ISO 2021 – All rights reserved 13
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ISO 12642-3:2021(E)
Table B.1 (continued)
ID C M Y K
254 10,0 10,0 30,0 0,0
255 10,0 20,0 30,0 0,0
256 10,0 30,0 30,0 0,0
257 10,0 40,0 30,0 0,0
258 10,0 55,0 30,0 0,0
259 10,0 70,0 30,0 0,0
260 10,0 85,0 30,0 0,0
261 10,0 100,0 30,0 0,0
262 20,0 0,0 30,0 0,0
263 20,0 10,0 30,0 0,0
264 20,0 20,0 30,0 0,0
265 20,0 30,0 30,0 0,0
266 20,0 40,0 30,0 0,0
267 20,0 55,0 30,0 0,0
268 20,0 70,0 30,0 0,0
269 20,0 85,0 30,0 0,0
270 20,0 100,0 30,0 0,0
271 30,0 0,0 30,0 0,0
272 30,0 10,0 30,0 0,0
273 30,0 20,0 30,0 0,0
274 30,0 30,0 30,0 0,0
275 30,0 40,0 30,0 0,0
276 30,0 55,0 30,0 0,0
277 30,0 70,0 30,0 0,0
278 30,0 85,0 30,0 0,0
279 30,0 100,0 30,0 0,0
280 40,0 0,0 30,0 0,0
281 40,0 10,0 30,0 0,0
282 40,0 20,0 30,0 0,0
283 40,0 30,0 30,0 0,0
284 40,0 40,0 30,0 0,0
285 40,0 55,0 30,0 0,0
286 40,0 70,0 30,0 0,0
287 40,0 85,0 30,0 0,0
288 40,0 100,0 30,0 0,0
289 55,0 0,0 30,0 0,0
290 55,0 10,0 30,0 0,0
291 55,0 20,0 30,0 0,0
292 55,0 30,0 30,0 0,0
293 55,0 40,0 30,0 0,0
294 55,0 55,0 30,0 0,0
295 55,0 70,0 30,0 0,0
296 55,0 85,0 30,0 0,0
297 55,0 100,0 30,0 0,0
14 © ISO 2021 – All rights reserved
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ISO 12642-3:2021(E)
Table B.1 (continued)
ID C M Y K
298 70,0 0,0 30,0 0,0
299 70,0 10,0 30,0 0,0
300 70,0 20,0 30,0 0,0
301 70,0 30,0 30,0 0,0
302 70,0 40,0 30,0 0,0
303 70,0 55,0 30,0 0,0
304 70,0 70,0 30,0 0,0
305 70,0 85,0 30,0 0,0
306 70,0 100,0 30,0 0,0
307 85,0 0,0 30,0 0,0
308 85,0 10,0 30,0 0,0
309 85,0 20,0 30,0 0,0
310 85,0 30,0 30,0 0,0
311 85,0 40,0 30,0 0,0
312 85,0 55,0 30,0 0,0
313 85,0 70,0 30,0 0,0
314 85,0 85,0 30,0 0,0
315 85,0 100,0 30,0 0,0
316 100,0 0,0 30,0 0,0
317 100,0 10,0 30,0 0,0
318 100,0 20,0 30,0 0,0
319 100,0 30,0 30,0 0,0
320 100,0 40,0 30,0 0,0
321 100,0 55,0 30,0 0,0
322 100,0 70,0 30,0 0,0
323 100,0 85,0 30,0 0,0
324 100,0 100,0 30,0 0,0
325 0,0 0,0 40,0 0,0
326 0,0 10,0 40,0 0,0
327 0,0 20,0 40,0 0,0
328 0,0 30,0 40,0 0,0
329 0,0 40,0 40,0 0,0
330 0,0 55,0 40,0 0,0
331 0,0 70,0 40,0 0,0
332 0,0 85,0 40,0 0,0
333 0,0 100,0 40,0 0,0
334 10,0 0,0 40,0 0,0
335 10,0 10,0 40,0 0,0
336 10,0 20,0 40,0 0,0
337 10,0 30,0 40,0 0,0
338 10,0 40,0 40,0 0,0
339 10,0 55,0 40,0 0,0
340 10,0 70,0 40,0 0,0
341 10,0 85,0 40,0 0,0
© ISO 2021 – All rights reserved 15
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ISO 12642-3:2021(E)
Table B.1 (continued)
ID C M Y K
342 10,0 100,0 40,0 0,0
343 20,0 0,0 40,0 0,0
344 20,0 10,0 40,0 0,0
345 20,0 20,0 40,0 0,0
346 20,0 30,0 40,0 0,0
347 20,0 40,0 40,0 0,0
348 20,0 55,0 40,0 0,0
349 20,0 70,0 40,0 0,0
350 20,0 85,0 40,0 0,0
351 20,0 100,0 40,0 0,0
352 30,0 0,0 40,0 0,0
353 30,0 10,0 40,0 0,0
354 30,0 20,0 40,0 0,0
355 30,0 30,0 40,0 0,0
356 30,0 40,0 40,0 0,0
357 30,0 55,0 40,0 0,0
358 30,0 70,0 40,0 0,0
359 30,0 85,0 40,0 0,0
360 30,0 100,0 40,0 0,0
361 40,0 0,0 40,0 0,0
362 40,0 10,0 40,0 0,0
363 40,0 20,0 40,0 0,0
364 40,0 30,0 40,0 0,0
365 40,0 40,0 40,0 0,0
366 40,0 55,0 40,0 0,0
367 40,0 70,0 40,0 0,0
368 40,0 85,0 40,0 0,0
369 40,0 100,0 40,0 0,0
370 55,0 0,0 40,0 0,0
371 55,0 10,0 40,0 0,0
372 55,0 20,0 40,0 0,0
373 55,0 30,0 40,0 0,0
374 55,0 40,0 40,0 0,0
375 55,0 55,0 40,0 0,0
376 55,0 70,0 40,0 0,0
377 55,0 85,0 40,0 0,0
378 55,0 100,0 40,0 0,0
379 70,0 0,0 40,0 0,0
380 70,0 10,0 40,0 0,0
381 70,0 20,0 40,0 0,0
382 70,0 30,0 40,0 0,0
383 70,0 40,0 40,0 0,0
384 70,0 55,0 40,0 0,0
385 70,0 70,0 40,0 0,0
16 © ISO 2021 – All rights reserved
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ISO 12642-3:2021(E)
Table B.1 (continued)
ID C M Y K
386 70,0 85,0 40,0 0,0
387 70,0 100,0 40,0 0,0
388 85,0 0,0 40,0 0,0
389 85,0 10,0 40,0 0,0
390 85,0 20,0 40,0 0,0
391 85,0 30,0 40,0 0,0
392 85,0 40,0 40,0 0,0
393 85,0 55,0 40,0 0,0
394 85,0 70,0 40,0 0,0
395 85,0 85,0 40,0 0,0
396 85,0 100,0 40,0 0,0
397 100,0 0,0 40,0 0,0
398 100,0 10,0 40,0 0,0
399 100,0 20,0 40,0 0,0
400 100,0 30,0 40,0 0,0
401 100,0 40,0 40,0 0,0
402 100,0 55,0 40,0 0,0
403 100,0 70,0 40,0 0,0
404 100,0 85,0 40,0 0,0
405 100,0 100,0 40,0 0,0
406 0,0 0,0 55,0 0,0
407 0,0 10,0 55,0 0,0
408 0,0 20,0 55,0 0,0
409 0,0 30,0 55,0 0,0
410 0,0 40,0 55,0 0,0
411 0,0 55,0 55,0 0,0
412 0,0 70,0 55,0 0,0
413 0,0 85,0 55,0 0,0
414 0,0 100,0 55,0 0,0
415 10,0 0,0 55,0 0,0
416 10,0 10,0 55,0 0,0
417 10,0 20,0 55,0 0,0
418 10,0 30,0 55,0 0,0
419 10,0 40,0 55,0 0,0
420 10,0 55,0 55,0 0,0
421 10,0 70,0 55,0 0,0
422 10,0 85,0 55,0 0,0
423 10,0 100,0 55,0 0,0
424 20,0 0,0 55,0 0,0
425 20,0 10,0 55,0 0,0
426 20,0 20,0 55,0 0,0
427 20,0 30,0 55,0 0,0
428 20,0 40,0 55,0 0,0
429 20,0 55,0 55,0 0,0
© ISO 2021 – All rights reserved 17
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ISO 12642-3:2021(E)
Table B.1 (continued)
ID C M Y K
430 20,0 70,0 55,0 0,0
431 20,0 85,0 55,0 0,0
432 20,0 100,0 55,0 0,0
433 30,0 0,0 55,0 0,0
434 30,0 10,0 55,0 0,0
435 30,0 20,0 55,0 0,0
436 30,0 30,0 55,0 0,0
437 30,0 40,0 55,0 0,0
438 30,0 55,0 55,0 0,0
439 30,0 70,0 55,0 0,0
440 30,0 85,0 55,0 0,0
441 30,0 100,0 55,0 0,0
442 40,0 0,0 55,0 0,0
443 40,0 10,0 55,0 0,0
444 40,0 20,0 55,0 0,0
445 40,0 30,0 55,0 0,0
446 40,0 40,0 55,0 0,0
447 40,0 55,0 55,0 0,0
448 40,0 70,0 55,0 0,0
449 40,0 85,0 55,0 0,0
450 40,0 100,0 55,0 0,0
451 55,0 0,0 55,0 0,0
452 55,0 10,0 55,0 0,0
453 55,0 20,0 55,0 0,0
454 55,0 30,0 55,0 0,0
455 55,0 40,0 55,0 0,0
456 55,0 55,0 55,0 0,0
457 55,0 70,0 55,0 0,0
458 55,0 85,0 55,0 0,0
459 55,0 100,0 55,0 0,0
460 70,0 0,0 55,0 0,0
461 70,0 10,0 55,0 0,0
462 70,0 20,0 55,0 0,0
463 70,0 30,0 55,0 0,0
464 70,0 40,0 55,0 0,0
465 70,0 55,0 55,0 0,0
466 70,0 70,0 55,0 0,0
467 7
...

FINAL
INTERNATIONAL ISO/FDIS
DRAFT
STANDARD 12642-3
ISO/TC 130
Graphic technology — Input data for
Secretariat: SAC
characterization of 4-colour process
Voting begins on:
2021-06-21 printing —
Voting terminates on:
Part 3:
2021-08-16
Extended data set
RECIPIENTS OF THIS DRAFT ARE INVITED TO
SUBMIT, WITH THEIR COMMENTS, NOTIFICATION
OF ANY RELEVANT PATENT RIGHTS OF WHICH
THEY ARE AWARE AND TO PROVIDE SUPPOR TING
DOCUMENTATION.
IN ADDITION TO THEIR EVALUATION AS
Reference number
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO-
ISO/FDIS 12642-3:2021(E)
LOGICAL, COMMERCIAL AND USER PURPOSES,
DRAFT INTERNATIONAL STANDARDS MAY ON
OCCASION HAVE TO BE CONSIDERED IN THE
LIGHT OF THEIR POTENTIAL TO BECOME STAN-
DARDS TO WHICH REFERENCE MAY BE MADE IN
NATIONAL REGULATIONS. ISO 2021
---------------------- Page: 1 ----------------------
ISO/FDIS 12642-3:2021(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2021

All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may

be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting

on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address

below or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2021 – All rights reserved
---------------------- Page: 2 ----------------------
ISO/FDIS 12642-3:2021(E)
Contents Page

Foreword ........................................................................................................................................................................................................................................iv

Introduction ..................................................................................................................................................................................................................................v

1 Scope ................................................................................................................................................................................................................................. 1

2 Normative references ...................................................................................................................................................................................... 1

3 Terms and definitions ..................................................................................................................................................................................... 1

4 Technical requirements ................................................................................................................................................................................ 2

4.1 Background ................................................................................................................................................................................................ 2

4.2 Tone value precision .......................................................................................................................................................................... 2

4.3 Data set definition ................................................................................................................................................................................ 2

4.4 Layouts for printing ............................................................................................................................................................................ 4

4.5 Compatibility with data based on the ISO 12642-2 target ............................................................................... 5

Annex A (informative) Example layout and image file ....................................................................................................................... 6

Annex B (informative) ID and ink values of the ISO 12647-3 data set............................................................................... 8

Bibliography .............................................................................................................................................................................................................................45

© ISO 2021 – All rights reserved iii
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ISO/FDIS 12642-3:2021(E)
Foreword

ISO (the International Organization for Standardization) is a worldwide federation of national standards

bodies (ISO member bodies). The work of preparing International Standards is normally carried out

through ISO technical committees. Each member body interested in a subject for which a technical

committee has been established has the right to be represented on that committee. International

organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.

ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of

electrotechnical standardization.

The procedures used to develop this document and those intended for its further maintenance are

described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the

different types of ISO documents should be noted. This document was drafted in accordance with the

editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/ directives).

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of

any patent rights identified during the development of the document will be in the Introduction and/or

on the ISO list of patent declarations received (see www .iso .org/ patents).

Any trade name used in this document is information given for the convenience of users and does not

constitute an endorsement.

For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and

expressions related to conformity assessment, as well as information about ISO's adherence to the

World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT), see www .iso .org/

iso/ foreword .html.

This document was prepared by Technical Committee ISO/TC 130, Graphic technology.

A list of all parts in the ISO 12642 series can be found on the ISO website.

Any feedback or questions on this document should be directed to the user’s national standards body. A

complete listing of these bodies can be found at www .iso .org/ members .html.
iv © ISO 2021 – All rights reserved
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ISO/FDIS 12642-3:2021(E)
Introduction

The existing characterization data set defined in ISO 12642-2, has proven very effective for use in

characterizing various printing processes. When the ISO 12642-2 and its predecessor the ISO 12642-1

target was introduced, there was a need for a visual layout and manual reading of the target. This led

to the need to have some ink value combinations repeated in both single-colour scales and in various

overprint combinations. This resulted in 29 duplicate patches in the ISO 12642-2 data sets.

Although a totally revised and/or expanded target has been proposed at various times, the size of the

existing ISO 12642-2 target and its patch size have been accepted by the industry and most scanning

spectrophotometers contain drivers that accept this format. This led to the decision that the most useful

way forward was to simply replace the duplicate patches with new ink value combinations. Because of

the increased use of neutral scale calibration, it was felt that these patches would be more useful as

additional black only patches and near-neutrals. The ISO 12642-3 target described in this document

represents the implementation of these proposals. Some of the removed patches were used in other

systems, while duplicate patches were used to verify consistency. The use of multiple targets, averaged

measurements and printing of targets along with the ISO 12642-3 are processes that can be used for

the capture of the desired data.

There is no required layout or patch size defined for this data set. Users are free to randomize the layout

and/or “fit” it to the space available. However, the members of the graphic arts community believe

strongly that an example layout should be provided as a guide to the user. Because of the removal

of the 29 patches that “filled out” the symmetrical colour layout, no “visual” layout is provided. One

randomized example layout is provided.

The needs of publication, commercial, and package printing with offset lithography, gravure,

flexography, and other printing processes have been considered.
© ISO 2021 – All rights reserved v
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FINAL DRAFT INTERNATIONAL STANDARD ISO/FDIS 12642-3:2021(E)
Graphic technology — Input data for characterization of
4-colour process printing —
Part 3:
Extended data set
1 Scope

This document defines a data set of ink value combinations that can be used to characterize four-colour

process printing. This data set is not optimized for any printing process or application area but is robust

enough for all general applications. While it is primarily aimed at process colour printing with CMYK

inks, it can also be used with any combination of three chromatic inks and a dark ink.

This document is an alternative to the ISO 12642-2 data set where more neutral scale data are desired.

It is not designed as a replacement for ISO 12642-2.
2 Normative references

The following documents are referred to in the text in such a way that some or all of their content

constitutes requirements of this document. For dated references, only the edition cited applies. For

undated references, the latest edition of the referenced document (including any amendments) applies.

ISO 12642-2, Graphic technology — Input data for characterization of 4-colour process printing — Part 2:

Expanded data set
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/
3.1
data set
total collection of independently identified ink value sets

Note 1 to entry: The terms “patch” and “target” are deliberately avoided because they imply a physical object or

layout. This document only defines the data values that users are free to arrange in any target layout that meets

their needs, using patches of any size compatible with their measuring equipment.

3.2
ink values

digital value that represents the amount of a colorant required in a rendering process, which, for the

halftone printing process, is equivalent to the tone value/dot area expressed as a percentage

3.3
ink value set

set of four ink values (3.2) representing the amount of the four colours to be used in a process colour

area
© ISO 2021 – All rights reserved 1
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ISO/FDIS 12642-3:2021(E)
4 Technical requirements
4.1 Background

The technical requirements and data set definitions that apply to the data set elements of this document

shall be in accordance with ISO 12642-2.

The key additional requirement that has been identified by the users of the existing target is the need

for more black and near-neutral combinations of C, M, Y ink values. In addition, the use of the visual

layout of the target has diminished with the increased use of automated scanning spectrophotometers.

These two factors have allowed the 29 duplicate ink value sets (patches) to be removed and replaced

with 29 new ink value sets (patches) to improve CMY neutral (23 samples) and K-only (6 samples)

aspects of printing characterization and profile computation.
4.2 Tone value precision

The tone values listed in this document are expressed as whole integer percentages, except for magenta

and yellow in the CMY grey scale, which are rounded to one decimal place from the grey balance

formulae in CGATS TR 015, as shown in Formula (1).
−−42 53
MY == 0,,747 04CC−× 100 10 +× 2,940 10 C (1)
This precision can be important in very light grey patches between 0 and 20 %.

Many commercial ICC profiling software generates printable target images from the supplied ISO 28178

text files with 8 bit-per channel precision, which is adequate for most purposes. Printable targets are

available that have an precision of 16 bits per channel (when integrated by a 3 mm spectrophotometer

aperture) thanks to the use of LSB error diffusion when the original 16 bit images were flattened to

8 bits. This is the approach taken in the example target in Annex A.
4.3 Data set definition

Table 1 lists the ink value sets that have been deleted from the ISO 12642-2 target and shows the IDs of

the retained patches with identical values.
2 © ISO 2021 – All rights reserved
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ISO/FDIS 12642-3:2021(E)
Table 1 — Deleted patches and retained equivalents
Deleted Equivalent C M Y K
1287 73 100 0 0 0
1291 64 85 0 0 0
1294 55 70 0 0 0
1297 37 40 0 0 0
1298 28 30 0 0 0
1300 19 20 0 0 0
1302 10 10 0 0 0
1307 9 0 100 0 0
1311 8 0 85 0 0
1314 7 0 70 0 0
1317 5 0 40 0 0
1318 4 0 30 0 0
1320 3 0 20 0 0
1322 2 0 10 0 0
1327 649 0 0 100 0
1331 568 0 0 85 0
1334 487 0 0 70 0
1337 325 0 0 40 0
1338 244 0 0 30 0
1340 163 0 0 20 0
1342 82 0 0 10 0
1347 1260 0 0 0 100
1352 1096 0 0 0 80
1355 1071 0 0 0 60
1357 946 0 0 0 40
1360 730 0 0 0 20
1367 1 0 0 0 0
1368 647 100 85 85 0
1486 1362 0 0 0 10

The new ink value combinations have been assigned ID numbers 1618 through 1646 as shown in

Table 2.
© ISO 2021 – All rights reserved 3
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ISO/FDIS 12642-3:2021(E)
Table 2 — New INK value combinations and their IDs
ID C M Y K
1618 25,0 18,9 18,9 0,0
1619 20,0 15,0 15,0 0,0
1620 15,0 11,2 11,2 0,0
1621 10,0 7,5 7,5 0,0
1622 8,0 6,0 6,0 0,0
1623 6,0 4,5 4,5 0,0
1624 4,0 3,0 3,0 0,0
1625 65,0 54,9 54,9 0,0
1626 60,0 49,7 49,7 0,0
1627 55,0 44,7 44,7 0,0
1628 45,0 35,5 35,5 0,0
1629 40,0 31,1 31,1 0,0
1630 35,0 26,9 26,9 0,0
1631 30,0 22,8 22,8 0,0
1632 0,0 0,0 0,0 4,0
1633 95,0 92,5 92,5 0,0
1634 90,0 85,3 85,3 0,0
1635 85,0 78,6 78,6 0,0
1636 80,0 72,2 72,2 0,0
1637 75,0 66,1 66,1 0,0
1638 70,0 60,4 60,4 0,0
1639 0,0 0,0 0,0 65,0
1640 0,0 0,0 0,0 55,0
1641 0,0 0,0 0,0 45,0
1642 0,0 0,0 0,0 35,0
1643 0,0 0,0 0,0 8,0
1644 2,0 1,5 1,5 0,0
1645 98,0 96,9 96,9 0,0
1646 0,0 0,0 0,0 6,0

The accompanying files, available from https:// standards .iso .org/ iso/ 12642/ -3/ ed -1/ en, represent

a complete listing of the ink value combinations and their assigned ID numbers that constitute

the ISO 12642-3 characterization data set. Information about the relationship of this data set and

ISO 12642-2 can be found in Annex B.
4.4 Layouts for printing

The ink value sets of this document may be printed in any arrangement desired. Any arrangement shall

include all 1617 ink value sets and shall include a reference to this document to be a valid ISO 12642-3

data set.

For any specific arrangement, a table defining the relationship between position (typically row-column)

and ID number shall be provided.

One example layout is shown in Annex A along with their layout data and image files.

4 © ISO 2021 – All rights reserved
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ISO/FDIS 12642-3:2021(E)
4.5 Compatibility with data based on the ISO 12642-2 target

Where it is necessary to compare data to earlier data generated with the ISO 12642-2 target, the ID

values of the deleted and equivalent ink value sets in Table 1 can be used to recreate a full ISO 12642-2

data set.
© ISO 2021 – All rights reserved 5
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ISO/FDIS 12642-3:2021(E)
Annex A
(informative)
Example layout and image file
A.1 General

Although there is no requirement that any particular arrangement of these data be used for printing

characterization targets, it was felt that for many users an example layout was desirable to facilitate

use of the target and familiarize the user with the placement of the neutral ramps. Accordingly, one

example layout is provided along with a caution on the layout of the grey ramps in any target design.

A.2 Design

Unlike ISO 12642-2, ISO 12642-3 should only be used in randomized layouts (this is why there is no

“visual” example), however the CMY and K-only grey patches should not be randomized, but rather

arranged as two contiguous grey ramps along the edge of the target. This helps reduce small tonality

or colour variations throughout the grey ramps due to in-line ink starvation effects or uneven inking

that would be magnified if the grey patches were randomized throughout the target. Target orientation

should be positioned to best optimize grey ramp in line with print technology.
A.3 Layout and cross reference data

The file 12642-3_ID_ and_ Layout_Crossreference.xls provides a table of the ISO 12642-3 IDs and ink

value data sets as well as a sort index as row column identification for the example layouts.

Figure A.1 shows a reduced size image of the example layout.
Image files for example layout 12642-3-DH include both TIFF and PDF formats.

These files are available for download here: https:// standards .iso .org/ iso/ 12642/ -3/ ed -1/ en/ .

6 © ISO 2021 – All rights reserved
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ISO/FDIS 12642-3:2021(E)
Figure A.1 — 12642-3-DH
© ISO 2021 – All rights reserved 7
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ISO/FDIS 12642-3:2021(E)
Annex B
(informative)
ID and ink values of the ISO 12647-3 data set

Table B.1 shows the corresponding ID and Ink values of the ISO 12647-3 data set. The ID’s are not

contiguous as the duplicate values from the ISO 12647-2 data set have been removed with the new

neutral patches are seen from ID’s 1618 to 1646.
Table B.1 — ISO 12642-3 Target definition
ID C M Y K
1 0,0 0,0 0,0 0,0
2 0,0 10,0 0,0 0,0
3 0,0 20,0 0,0 0,0
4 0,0 30,0 0,0 0,0
5 0,0 40,0 0,0 0,0
6 0,0 55,0 0,0 0,0
7 0,0 70,0 0,0 0,0
8 0,0 85,0 0,0 0,0
9 0,0 100,0 0,0 0,0
10 10,0 0,0 0,0 0,0
11 10,0 10,0 0,0 0,0
12 10,0 20,0 0,0 0,0
13 10,0 30,0 0,0 0,0
14 10,0 40,0 0,0 0,0
15 10,0 55,0 0,0 0,0
16 10,0 70,0 0,0 0,0
17 10,0 85,0 0,0 0,0
18 10,0 100,0 0,0 0,0
19 20,0 0,0 0,0 0,0
20 20,0 10,0 0,0 0,0
21 20,0 20,0 0,0 0,0
22 20,0 30,0 0,0 0,0
23 20,0 40,0 0,0 0,0
24 20,0 55,0 0,0 0,0
25 20,0 70,0 0,0 0,0
26 20,0 85,0 0,0 0,0
27 20,0 100,0 0,0 0,0
28 30,0 0,0 0,0 0,0
29 30,0 10,0 0,0 0,0
30 30,0 20,0 0,0 0,0
31 30,0 30,0 0,0 0,0
32 30,0 40,0 0,0 0,0
33 30,0 55,0 0,0 0,0
8 © ISO 2021 – All rights reserved
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ISO/FDIS 12642-3:2021(E)
Table B.1 (continued)
ID C M Y K
34 30,0 70,0 0,0 0,0
35 30,0 85,0 0,0 0,0
36 30,0 100,0 0,0 0,0
37 40,0 0,0 0,0 0,0
38 40,0 10,0 0,0 0,0
39 40,0 20,0 0,0 0,0
40 40,0 30,0 0,0 0,0
41 40,0 40,0 0,0 0,0
42 40,0 55,0 0,0 0,0
43 40,0 70,0 0,0 0,0
44 40,0 85,0 0,0 0,0
45 40,0 100,0 0,0 0,0
46 55,0 0,0 0,0 0,0
47 55,0 10,0 0,0 0,0
48 55,0 20,0 0,0 0,0
49 55,0 30,0 0,0 0,0
50 55,0 40,0 0,0 0,0
51 55,0 55,0 0,0 0,0
52 55,0 70,0 0,0 0,0
53 55,0 85,0 0,0 0,0
54 55,0 100,0 0,0 0,0
55 70,0 0,0 0,0 0,0
56 70,0 10,0 0,0 0,0
57 70,0 20,0 0,0 0,0
58 70,0 30,0 0,0 0,0
59 70,0 40,0 0,0 0,0
60 70,0 55,0 0,0 0,0
61 70,0 70,0 0,0 0,0
62 70,0 85,0 0,0 0,0
63 70,0 100,0 0,0 0,0
64 85,0 0,0 0,0 0,0
65 85,0 10,0 0,0 0,0
66 85,0 20,0 0,0 0,0
67 85,0 30,0 0,0 0,0
68 85,0 40,0 0,0 0,0
69 85,0 55,0 0,0 0,0
70 85,0 70,0 0,0 0,0
71 85,0 85,0 0,0 0,0
72 85,0 100,0 0,0 0,0
73 100,0 0,0 0,0 0,0
74 100,0 10,0 0,0 0,0
75 100,0 20,0 0,0 0,0
76 100,0 30,0 0,0 0,0
77 100,0 40,0 0,0 0,0
© ISO 2021 – All rights reserved 9
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ISO/FDIS 12642-3:2021(E)
Table B.1 (continued)
ID C M Y K
78 100,0 55,0 0,0 0,0
79 100,0 70,0 0,0 0,0
80 100,0 85,0 0,0 0,0
81 100,0 100,0 0,0 0,0
82 0,0 0,0 10,0 0,0
83 0,0 10,0 10,0 0,0
84 0,0 20,0 10,0 0,0
85 0,0 30,0 10,0 0,0
86 0,0 40,0 10,0 0,0
87 0,0 55,0 10,0 0,0
88 0,0 70,0 10,0 0,0
89 0,0 85,0 10,0 0,0
90 0,0 100,0 10,0 0,0
91 10,0 0,0 10,0 0,0
92 10,0 10,0 10,0 0,0
93 10,0 20,0 10,0 0,0
94 10,0 30,0 10,0 0,0
95 10,0 40,0 10,0 0,0
96 10,0 55,0 10,0 0,0
97 10,0 70,0 10,0 0,0
98 10,0 85,0 10,0 0,0
99 10,0 100,0 10,0 0,0
100 20,0 0,0 10,0 0,0
101 20,0 10,0 10,0 0,0
102 20,0 20,0 10,0 0,0
103 20,0 30,0 10,0 0,0
104 20,0 40,0 10,0 0,0
105 20,0 55,0 10,0 0,0
106 20,0 70,0 10,0 0,0
107 20,0 85,0 10,0 0,0
108 20,0 100,0 10,0 0,0
109 30,0 0,0 10,0 0,0
110 30,0 10,0 10,0 0,0
111 30,0 20,0 10,0 0,0
112 30,0 30,0 10,0 0,0
113 30,0 40,0 10,0 0,0
114 30,0 55,0 10,0 0,0
115 30,0 70,0 10,0 0,0
116 30,0 85,0 10,0 0,0
117 30,0 100,0 10,0 0,0
118 40,0 0,0 10,0 0,0
119 40,0 10,0 10,0 0,0
120 40,0 20,0 10,0 0,0
121 40,0 30,0 10,0 0,0
10 © ISO 2021 – All rights reserved
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ISO/FDIS 12642-3:2021(E)
Table B.1 (continued)
ID C M Y K
122 40,0 40,0 10,0 0,0
123 40,0 55,0 10,0 0,0
124 40,0 70,0 10,0 0,0
125 40,0 85,0 10,0 0,0
126 40,0 100,0 10,0 0,0
127 55,0 0,0 10,0 0,0
128 55,0 10,0 10,0 0,0
129 55,0 20,0 10,0 0,0
130 55,0 30,0 10,0 0,0
131 55,0 40,0 10,0 0,0
132 55,0 55,0 10,0 0,0
133 55,0 70,0 10,0 0,0
134 55,0 85,0 10,0 0,0
135 55,0 100,0 10,0 0,0
136 70,0 0,0 10,0 0,0
137 70,0 10,0 10,0 0,0
138 70,0 20,0 10,0 0,0
139 70,0 30,0 10,0 0,0
140 70,0 40,0 10,0 0,0
141 70,0 55,0 10,0 0,0
142 70,0 70,0 10,0 0,0
143 70,0 85,0 10,0 0,0
144 70,0 100,0 10,0 0,0
145 85,0 0,0 10,0 0,0
146 85,0 10,0 10,0 0,0
147 85,0 20,0 10,0 0,0
148 85,0 30,0 10,0 0,0
149 85,0 40,0 10,0 0,0
150 85,0 55,0 10,0 0,0
151 85,0 70,0 10,0 0,0
152 85,0 85,0 10,0 0,0
153 85,0 100,0 10,0 0,0
154 100,0 0,0 10,0 0,0
155 100,0 10,0 10,0 0,0
156 100,0 20,0 10,0 0,0
157 100,0 30,0 10,0 0,0
158 100,0 40,0 10,0 0,0
159 100,0 55,0 10,0 0,0
160 100,0 70,0 10,0 0,0
161 100,0 85,0 10,0 0,0
162 100,0 100,0 10,0 0,0
163 0,0 0,0 20,0 0,0
164 0,0 10,0 20,0 0,0
165 0,0 20,0 20,0 0,0
© ISO 2021 – All rights reserved 11
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ISO/FDIS 12642-3:2021(E)
Table B.1 (continued)
ID C M Y K
166 0,0 30,0 20,0 0,0
167 0,0 40,0 20,0 0,0
168 0,0 55,0 20,0 0,0
169 0,0 70,0 20,0 0,0
170 0,0 85,0 20,0 0,0
171 0,0 100,0 20,0 0,0
172 10,0 0,0 20,0 0,0
173 10,0 10,0 20,0 0,0
174 10,0 20,0 20,0 0,0
175 10,0 30,0 20,0 0,0
176 10,0 40,0 20,0 0,0
177 10,0 55,0 20,0 0,0
178 10,0 70,0 20,0 0,0
179 10,0 85,0 20,0 0,0
180 10,0 100,0 20,0 0,0
181 20,0 0,0 20,0 0,0
182 20,0 10,0 20,0 0,0
183 20,0 20,0 20,0 0,0
184 20,0 30,0 20,0 0,0
185 20,0 40,0 20,0 0,0
186 20,0 55,0 20,0 0,0
187 20,0 70,0 20,0 0,0
188 20,0 85,0 20,0 0,0
189 20,0 100,0 20,0 0,0
190 30,0 0,0 20,0 0,0
191 30,0 10,0 20,0 0,0
192 30,0 20,0 20,0 0,0
193 30,0 30,0 20,0 0,0
194 30,0 40,0 20,0 0,0
195 30,0 55,0 20,0 0,0
196 30,0 70,0 20,0 0,0
197 30,0 85,0 20,0 0,0
198 30,0 100,0 20,0 0,0
199 40,0 0,0 20,0 0,0
200 40,0 10,0 20,0 0,0
201 40,0 20,0 20,0 0,0
202 40,0 30,0 20,0 0,0
203 40,0 40,0 20,0 0,0
204 40,0 55,0 20,0 0,0
205 40,0 70,0 20,0 0,0
206 40,0 85,0 20,0 0,0
207 40,0 100,0 20,0 0,0
208 55,0 0,0 20,0 0,0
209 55,0 10,0 20,0 0,0
12 © ISO 2021 – All rights reserved
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ISO/FDIS 12642-3:2021(E)
Table B.1 (continued)
ID C M Y K
210 55,0 20,0 20,0 0,0
211 55,0 30,0 20,0 0,0
212 55,0 40,0 20,0 0,0
213 55,0 55,0 20,0 0,0
214 55,0 70,0 20,0 0,0
215 55,0 85,0 20,0 0,0
216 55,0 100,0 20,0 0,0
217 70,0 0,0 20,0 0,0
218 70,0 10,0 20,0 0,0
219 70,0 20,0 20,0 0,0
220 70,0 30,0 20,0 0,0
221 70,0 40,0 20,0 0,0
222 70,0 55,0 20,0 0,0
223 70,0 70,0 20,0 0,0
224 70,0 85,0 20,0 0,0
225 70,0 100,0 20,0 0,0
226 85,0 0,0 20,0 0,0
227 85,0 10,0 20,0 0,0
228 85,0 20,0 20,0 0,0
229 85,0 30,0 20,0 0,0
230 85,0 40,0 20,0 0,0
231 85,0 55,0 20,0 0,0
232 85,0 70,0 20,0 0,0
233 85,0 85,0 20,0 0,0
234 85,0 100,0 20,0 0,0
235 100,0 0,0 20,0 0,0
236 100,0 10,0 20,0 0,0
237 100,0 20,0 20,0 0,0
238 100,0 30,0 20,0 0,0
239 100,0 40,0 20,0 0,0
240 100,0 55,0 20,0 0,0
241 100,0 70,0 20,0 0,0
242 100,0 85,0 20,0 0,0
243 100,0 100,0 20,0 0,0
244 0,0 0,0 30,0 0,0
245 0,0 10,0 30,0 0,0
246 0,0 20,0 30,0 0,0
247 0,0 30,0 30,0 0,0
248 0,0 40,0 30,0 0,0
249 0,0 55,0 30,0 0,0
250 0,0 70,0 30,0 0,0
251 0,0 85,0 30,0 0,0
252 0,0 100,0 30,0 0,0
253 10,0 0,0 30,0 0,0
© ISO 2021 – All rights reserved 13
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ISO/FDIS 12642-3:2021(E)
Table B.1 (continued)
ID C M Y K
254 10,0 10,0 30,0 0,0
255 10,0 20,0 30,0 0,0
256 10,0 30,0 30,0 0,0
257 10,0 40,0 30,0 0,0
258 10,0 55,0 30,0 0,0
259 10,0 70,0 30,0 0,0
260 10,0 85,0 30,0 0,0
261 10,0 100,0 30,0 0,0
262 20,0 0,0 30,0 0,0
263 20,0 10,0 30,0 0,0
264 20,0 20,0 30,0 0,0
265 20,0 30,0 30,0 0,0
266 20,0 40,0 30,0 0,0
267 20,0 55,0 30,0 0,0
268 20,0 70,0 30,0 0,0
269 20,0 85,0 30,0 0,0
270 20,0 100,0 30,0 0,0
271 30,0 0,0 30,0 0,0
272 30,0 10,0 30,0 0,0
273 30,0 20,0 30,0 0,0
274 30,0 30,0 30,0 0,0
275 30,0 40,0 30,0 0,0
276 30,0 55,0 30,0 0,0
277 30,0 70,0 30,0 0,0
278 30,0 85,0 30,0 0,0
279 30,0 100,0 30,0 0,0
280 40,0 0,0 30,0 0,0
281 40,0 10,0 30,0 0,0
282 40,0 20,0 30,0 0,0
283 40,0 30,0 30,0 0,0
284 40,0 40,0 30,0 0,0
285 40,0 55,0 30,0 0,0
286 40,0 70,0 30,0 0,0
287 40,0 85,0 30,0 0,0
288 40,0 100,0 30,0 0,0
289 55,0 0,0 30,0 0,0
290 55,0 10,0 30,0 0,0
291 55,0 20,0 30,0 0,0
292 55,0 30,0 30,0 0,0
293 55,0 40,0 30,0 0,0
294 55,0 55,0 30,0 0,0
295 55,0 70,0 30,0 0,0
296 55,0 85,0 30,0 0,0
297 55,0 100,0 30,0 0,0
14 © ISO 2021 – All rights reserved
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ISO/FDIS 12642-3:2021(E)
Table B.1 (continued)
ID C M Y K
298 70,0 0,0 30,0 0,0
299 70,0 10,0 30,0 0,0
300 70,0 20,0 30,0 0,0
301 70,0 30,0 30,0 0,0
302 70,0 40,0 30,0 0,0
303 70,0 55,0 30,0 0,0
304 70,0 70,0 30,0 0,0
305 70,0 85,0 30,0 0,0
306 70,0 100,0 30,0 0,0
307 85,0 0,0 30,0 0,0
308 85,0 10,0 30,0 0,0
309 85,0 20,0 30,0 0,0
310 85,0 30,0 30,0 0,0
311 85,0 40,0 30,0 0,0
312 85,0 55,0 30,0 0,0
313 85,0 70,0 30,0 0,0
314 85,0 85,0 30,0 0,0
315 85,0 100,0 30,0 0,0
316 100,0 0,0 30,0 0,0
317 100,0 10,0 30,0 0,0
318 100,0 20,0 30,0 0,0
319 100,0 30,0 30,0 0,0
320 100,0 40,0 30,0 0,0
321 100,0 55,0 30,0 0,0
322 100,0 70,0 30,0 0,0
323 100,0 85,0 30,0 0,0
324 100,0 100,0 30,0 0,0
325 0,0 0,0 40,0 0,0
326 0,0 10,0 40,0 0,0
327 0,0 20,0 40,0 0,0
328 0,0 30,0 40,0 0,0
329 0,0 40,0 40,0 0,0
330 0,0 55,0 40,0 0,0
331 0,0 70,0 40,0 0,0
332 0,0 85,0 40,0 0,0
333 0,0 100,0 40,0 0,0
334 10,0 0,0 40,0 0,0
335 10,0 10,0 40,0 0,0
336 10,0 20,0 40,0 0,0
337 10,0 30,0 40,0 0,0
338 10,0 40,0 40,0 0,0
339 10,0 55,0 40,0 0,0
340 10,0 70,0 40,0 0,0
341 10,0 85,0 40,0 0,0
© ISO 2021 – All rights reserved 15
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ISO/FDIS 12642-3:2021(E)
Table B.1 (continued)
ID C M Y K
342 10,0 100,0 40,0 0,0
343 20,0 0,0 40,0 0,0
344 20,0 10,0 40,0 0,0
345 20,0 20,0 40,0 0,0
346 20,0 30,0 40,0 0,0
347 20,0 40,0 40,0 0,0
348 20,0 55,0 40,0 0,0
349 20,0 70,0 40,0 0,0
350 20,0 85,0 40,0 0,0
351 20,0 100,0 40,0 0,0
352 30,0 0,0 40,0 0,0
353 30,0 10,0 40,0 0,0
354 30,0 20,0 40,0 0,0
355 30,0 30,0 40,0 0,0
356 30,0 40,0 40,0 0,0
357 30,0 55,0 40,0 0,0
358 30,0 70,0 40,0 0,0
359 30,0 85,0 40,0 0,0
360 30,0 100,0 40,0 0,0
361 40,0 0,0 40,0 0,0
362 40,0 10,0 40,0 0,0
363 40,0 20,0 40,0 0,0
364 40,0 30,0 40,0 0,0
365 40,0 40,0 40,0 0,0
366 40,0 55,0 40,0 0,0
367 40,0 70,0 40,0 0,0
368 40,0 85,0 40,0 0,0
369 40,0 100,0 40,0 0,0
370 55,0 0,0 40,0 0,0
371 55,0 10,0 40,0 0,0
372 55,0 20,0 40,0 0,0
373 55,0 30,0 40,0 0,0
374 55,0 40,0 40,0 0,0
375 55,0 55,0 40,0 0,0
376 55,0 70,0 40,0 0,0
377 55,0 85,0 40,0 0,0
378 55,0 100,0 40,0 0,0
379 70,0 0,0 40,0 0,0
380 70,0 10,0 40,0 0,0
381 70,0 20,0 40,0 0,0
382 70,0 30,0 40,0 0,0
383 70,0 40,0 40,0 0,0
384 70,0 55,0 40,0 0,0
385 70,0 70,0 40,0 0,0
16 © ISO 2021 – All rights reserved
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ISO/FDIS 12642-3:2021(E)
Table B.1 (continued)
ID C M Y K
386 70,0 85,0 40,0 0,0
387 70,0 100,0 40,0 0,0
388 85,0 0,0 40,0 0,0
389 85,0 10,0 40,0 0,0
390 85,0 20,0 40,0 0,0
391 85,0 30,0 40,0 0,0
392 85,0 40,0 40,0 0,0
393 85,0 55,0 40,0 0,0
394 85,0 70,0 40,0 0,0
395 85,0 85,0 40,0 0,0
396 85,0 100,0 40,0 0,0
397 100,0 0,0 40,0 0,0
398 100,0 10,0 40,0 0,0
399 100,0 20,0 40,0 0,0
400 100,0 30,0 40,0 0,0
401 100,0 40,0 40,0 0,0
402 100,0 55,0 40,0 0,0
403 100,0 70,0 40,0 0,0
404 100,0 85,0 40,0 0,0
405 100,0 100,0 40,0 0,0
406 0,0 0,0 55,0 0,0
407 0,0 10,0 55,0 0,0
408 0,0 20,0 55,0 0,0
409 0,0 30,0 55,0 0,0
410 0,0 40,0 55,0 0,0
411 0,0 55,0 55,0 0,0
412 0,0 70,0 55,0 0,0
413 0,0 85,0 55,0 0,0
414 0,0 100,0 55,0 0,0
415 10,0 0,0 55,0 0,0
416 10,0 10,0 55,0 0,0
417 10,0 20,0 55,0 0,0
418 10,0 30,0 55,0 0,0
419 10,0 40,0 55,0 0,0
420 10,0 55,0 55,0 0,0
421 10,0 70,0 55,0 0,0
422 10,0 85,0 55,0 0,0
423 10,0 100,0 55,0 0,0
424 20,0 0,0 55,0 0,0
425 20,0 10,0 55,0 0,0
426 20,0 20,0 55,0 0,0
427 20,0 30,0 55,0 0,0
428 20,0 40,0 55,0 0,0
429 20,0 55,0 55,0 0,0
© ISO 2021 – All rights reserved 17
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ISO/FDIS 12642-3:2021(E)
Table B.1 (continued)
ID C M Y K
430 20,0 70,0 55,0 0,0
431 20,0 85,0 55,0 0,0
432 20,0 100,0 55,0 0,0
433 30,0 0,0 55,0 0,0
434 30,0 10,0 55,0 0,0
435 30,0 20,0 55,0 0,0
436 30,0 30,0 55,0 0,0
437 30,0 40,0 55,0 0,0
438 30,0 55,0 55,0 0,0
439 30,0 70,0 55,0 0,0
440 30,0 85,0
...

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