SIST EN ISO 105-J03:1999

Textiles - Tests for colour fastness - Part J03: Calculation of colour differences (ISO 105-J03:1995, including Technical Corrigendum 1:1996)

This standard specifies a method of calculation of colour differences, which together with ISO 105-J01 can be used as an alternative to the grey scales.

Textilien - Farbechtheitsprüfungen - Teil J03: Berechnung von Farbdifferenzen (ISO 105-J03:1995, einschließlich Technische Korrektur 1:1996)

Textiles - Essais de solidité des teintures - Partie J03: Calcul des différences de couleur (ISO 105-J03:1995, Rectificatif Technique 1:1996 inclus)

Tekstilije - Preskušanje barvne obstojnosti - Del J03: Računanje barvnih razlik (ISO 105-J03:1995, vključno s tehničnim popravkom 1:1996)

General Information

• Status: Withdrawn
• Publication Date: 28-Feb-1999
• Withdrawal Date: 19-Jan-2010
• ICS: 59.080.01 - Textiles in general
• Technical Committee: ITEK - Textile and textile products
• Current Stage: 9900 - Withdrawal (Adopted Project)
• Start Date: 04-Jan-2010
• Due Date: 27-Jan-2010
• Completion Date: 20-Jan-2010
• Ref Project: EN ISO 105-J03:1997 - Textiles - Tests for colour fastness - Part J03: Calculation of colour differences (ISO 105-J03:1995, including Technical Corrigendum 1:1996)

Relations

• Replaced By: SIST EN ISO 105-J03:2010 - Textiles - Tests for colour fastness - Part J03: Calculation of colour differences (ISO 105-J03:2009)
• Effective Date: 01-Feb-2010

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN ISO 105-J03:1999
01-marec-1999
7HNVWLOLMH3UHVNXãDQMHEDUYQHREVWRMQRVWL'HO-5DþXQDQMHEDUYQLKUD]OLN,62
-YNOMXþQRVWHKQLþQLPSRSUDYNRP
Textiles - Tests for colour fastness - Part J03: Calculation of colour differences (ISO 105-
J03:1995, including Technical Corrigendum 1:1996)
Textilien - Farbechtheitsprüfungen - Teil J03: Berechnung von Farbdifferenzen (ISO 105-
J03:1995, einschließlich Technische Korrektur 1:1996)
Textiles - Essais de solidité des teintures - Partie J03: Calcul des différences de couleur
(ISO 105-J03:1995, Rectificatif Technique 1:1996 inclus)
Ta slovenski standard je istoveten z: EN ISO 105-J03:1997
ICS:
59.080.01 Tekstilije na splošno Textiles in general
SIST EN ISO 105-J03:1999 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN ISO 105-J03:1999

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SIST EN ISO 105-J03:1999

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SIST EN ISO 105-J03:1999

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SIST EN ISO 105-J03:1999
INTERNATIONAL
IS0
STANDARD
105-JO3
First edition
1995-09-01
Textiles - Tests for colour fastness -
Part 503:
Calculation of colour differences
Textiles - Essais de solidit des teintures -
Partie J03: Calcul des diffkences de couleur
Reference number
IS0 105-JO3:1995(E)

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SIST EN ISO 105-J03:1999
IS0 105-J03:1995(E)
Foreword
IS0 (the International Organization for Standardization) is a worldwide
federation of national standards bodies (IS0 member bodies). The work
of preparing International Standards is normally carried out through IS0
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. IS0
collaborates closely with the International Electrotechnical Commission
(I EC) on all matters of electrotechnical standardization.
Draft International Standards adopted by the technical committees are
circulated to the member bodies for voting. Publication as an International
Standard requires approval by at least 75 % of the member bodies casting
a vote.
International Standard IS0 105-JO3 was prepared by Technical Committee
ISO/TC 38, Textiles, Subcommittee SC 1, Tests for co/owed textjles and
colorants.
This first edition of IS0 105-JO3 constitutes a partial revision of the third
edition of IS0 105-JO1 :1989.
IS0 105 was previously published in thirteen “parts”, each designated by
a letter (e.g. “Part A”), with publication dates between 1978 and 1985.
Each part contained a series of “sections”, each designated by the re-
spective part letter and a two-digit serial number (e.g. “Section A01 “).
These sections are now being republished as separate documents, them-
selves designated “parts” but retaining their earlier alphanumeric desig-
nations. A complete list of these parts is given in IS0 105-AOI .
Annexes A, B and C of this part of IS0 105 are for information only.
0 IS0 1995
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced
or utilized in any form or by any means, electronic or mechanical, including photocopying and
microfilm, without permission in writing from the publisher.
International Organization for Standardization
Case Postale 56 l CH-1211 Geneve 20 l Switzerland
Printed in Switzerland
ii

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SIST EN ISO 105-J03:1999
IS0 105-J03:1995(E)
INTERNATIONAL STANDARD 0 Iso
- Tests for colour fastness -
Textiles
Part J03:
Calculation of colour differences
1 Scope
This part of IS0 105 provides a method of calculating the colour difference between two specimens of the same
material, measured under the same conditions, such that the numerical value AECmC(Z:c) for the total colour dif-
ference quantifies the extent to which the two specimens do not match. It permits the specification of a maximum
value (tolerance) which depends only on the closeness of match required for a given end-use and not on the colour
involved, nor on the nature of the colour difference. The method also provides a means for establishing the ratio
of differences in lightness to chroma and to hue.
NOTE 1 Annex A gives guidance on the interpretation of results. Annex B provides sample test data for use in checking
computer programs. Annex C contains a sample computer program for calculating colour difference.
2 Principle
The CIE1) 1976 L*a*b* (CIELAB) colour space has been modified to enhance its visual uniformity when calculating
the colour difference between two specimens. The modifications to CIELAB by the CMC equation provide a nu-
merical value, All,,,, which describes the colour difference between a sample and a reference in a more nearly
uniform colour space. This permits the use of a single-number tolerance (“acceptability tolerance” or “pass/fail
tolerance”) for judging the acceptability of a colour match in which the tolerance is independent of the colour of
provide a means to interpret the three
the reference. The ellipsoid semi-axes (Is,, cSc and S,) used to derive AEcmc
separate components of colour difference (lightness, chroma and hue) in manners suitable for a wide range of
uses.
The equation for A&,,, describes an ellipsoidal boundary (with axes in the directions of lightness, chroma and hue)
centred about a reference. The agreed-upon A&,,, acceptability tolerance describes a volume within which all
specimens are acceptable matches to the reference.
The colour difference is composed of three components that comprise the differences between the reference and
the specimen. These are:
a) a lightness component that is weighted by the lightness tolerance (ti*/ZSL). This is represented as Ucmc.
If the AL,,, is positive, the specimen is lighter than the reference. If the A&,.,, is negative, the specimen is
darker than the reference;
b) a chroma component that is weighted by the chroma tolerance (AC*,&&). This is represented as AC,,,.
1) Commission lnternationale d’tclairage, Central Bureau, Kegelgasse 27, A-l 030, Vienna, Austria.

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SIST EN ISO 105-J03:1999
IS0 105-J03:1995(E) 0 IS0
is positive, the specimen is more chromatic than the reference. If the AC,,, is negative, the
If the AC,,,
specimen is less chromatic than the reference;
c) a hue component that is weighted by the hue tolerance (AH*&,). This is represented as AHcmc.
is positive, the hue difference of the specimen is anti-clockwise from the reference in the CIELAB
If the AH,,,
a*, b’ diagram. If the AH,,, is negative, the hue difference of the specimen is clockwise from the reference
in the CIELAB a*, b’ diagram.
3 Procedure
3.1 Calculation of CIELAB values
h,, values from the X, Y, 2 tristimulus values for both the reference and
Calculate the CIELAB L’, a*, b’, C*ab,
specimen as follows:
L* = l16(Y/Yn)"3 - 16 if Y/Y, > 0,008 856
or
L* = 903,3(Y/Y,) if Y/Yn < 0,008 856;
a+ = 500 [f(X/XJ - f(Y/YJ] ;
b'= 2Oqf(yIy,) -f(aG)]
where
if Xix, > 0,008 856
f(W&> = (x/x,)1'3
or
f(X/Xn) = 7,787(X/X,)) + 16/116 if Xix, < 0,008 856;
if Y/Y, > 0,008 856
f(Wn) = (w,,)“3
or
f(Y/Y,) = 7,787 Y/Yn) + 16/l 16 if Y/Y, < 0,008 856;
I3 ifZ/Z > 0,008 856
f(wqJ = (wn)
n
or
f(Z/ZJ = 7,787 Z/Zn) + 16/l I6 if Z/Z’ < 0,008 856;
C*,, = a** + b**)ll*;
(
h - arctan (b*/a*) expressed on a 0” to 360" scale with the a* positive axis being 0” and the b’ positive axis
ab -
at 90”.
For these equations, Xn, Yn and Zn are the tristimulus values of the iIIuminant/observer combination in which it is
desired to calculate CMC(Z:c) colour differences. The preferred illuminant/observer combination is D&l 0”. Table 1
gives the values for this and five other combinations.

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SIST EN ISO 105-J03:1999
IS0 105-J03:1995(E)
Table 1 - Tristimulus values for six illuminant/observer combinations
IIIuminant/observer Tristimulus values
combinations
xn m
I
94,811 100,00
107,304
WI 0”
95,047 100,00
108,883
D&j/2”
C/l 0" 97,285 100,00 116,145
C/2" 98,074 100,00 118,232
A/IO" 111,144 100,00 35,200
A/2" 109,850 100,00 35,585
3.2 Calculation of CIELAB colour differences values
Calculate the CIELAB colour differences AL*, ha*, Ab*, AC*ab, AE’,,, AH’,, using the following equations, in which
the subscripts R and S refer respectively to the reference and specimen CIELAB values:
AL* = L’, - L’,;
Aa’ = aeS - aeR;
Ab’ = b’, - b’,;
AC’,, =
C’,, s - C’,, R;
,
,
AE’,, = [(AL*)’ + (Aa’)’ + (Ab’)‘]“‘;
(AL*)’ - (AC+,,) ‘1 I”
= P4[ (AE*t3tJ2 -
AH’,,
where
p=l ifma
or
-1 ifm P=
andq=l if imi < 180
or
=
- 1 if Irnl > 180
4
where m = hab s - hab R
, I
in which I. 1 indicates that the positive value is to be used regardless of the sign of the expression between
the two lines.
or the equivalent
l/2
AH’,, =
t [2(c*,b,&*ab,R - a*Sa+R - “sb’R>l
where
t = 1 if a*SbLR < a*Rb’s
or
=-
t 1 if a’sb*R > a*Rb*S

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SIST EN ISO 105-J03:1999
IS0 105-503:1995(E)
3.3 Calculation of the CMC colour difference, A&.&C)
The CMC colour di
...