General methods of test for pigments and extenders - Part 25: Comparison of the colour, in full-shade systems, of white, black and coloured pigments - Colorimetric method (ISO 787-25:2019)

This document specifies a general test method for comparing the colour, in full-shade systems, of white, black or coloured pigments with that of an agreed reference pigment, using a colorimetric procedure.

Allgemeine Prüfverfahren für Pigmente und Füllstoffe - Vergleich der Farbe von Weiß-, Schwarz- und Buntpigmenten in Purton-Systemen - Teil 25: Farbmetrisches Verfahren (ISO 787-25:2019)

Méthodes générales d'essai des pigments et matières de charge - Partie 25: Comparaison, dans les systèmes monopigmentaires, de la couleur des pigments blancs, noirs et colorés - Méthode colorimétrique (ISO 787-25:2019)

Le présent document spécifie une méthode d'essai générale pour comparer, dans les systèmes monopigmentaires, la couleur des pigments blancs, noirs ou colorés avec celle d'un pigment de référence convenu, en utilisant une méthode colorimétrique.

Splošne metode preskušanja pigmentov in polnil - 25. del: Primerjava barve (full-shade) belih, črnih in barvnih pigmentov - Kolorimetrična metoda (ISO 787-25:2019)

Ta dokument določa splošno preskusno metodo za primerjavo barve (full-shade) belih,
črnih in barvnih pigmentov z dogovorjenim referenčnim pigmentom z uporabo kolorimetričnega postopka.

General Information

Status
Published
Publication Date
12-Mar-2019
Current Stage
6060 - Definitive text made available (DAV) - Publishing
Due Date
13-Mar-2019
Completion Date
13-Mar-2019

RELATIONS

Buy Standard

Standard
EN ISO 787-25:2019
English language
16 pages
sale 10% off
Preview
sale 10% off
Preview

e-Library read for
1 day

Standards Content (sample)

SLOVENSKI STANDARD
SIST EN ISO 787-25:2019
01-maj-2019
1DGRPHãþD
SIST EN ISO 787-25:2007

6SORãQHPHWRGHSUHVNXãDQMDSLJPHQWRYLQSROQLOGHO3ULPHUMDYDEDUYH IXOO

VKDGH EHOLKþUQLKLQEDUYQLKSLJPHQWRY.RORULPHWULþQDPHWRGD ,62


General methods of test for pigments and extenders - Part 25: Comparison of the colour,

in full-shade systems, of white, black and coloured pigments - Colorimetric method (ISO

787-25:2019)

Allgemeine Prüfverfahren für Pigmente und Füllstoffe - Vergleich der Farbe von Weiß-,

Schwarz- und Buntpigmenten in Purton-Systemen - Teil 25: Farbmetrisches Verfahren

(ISO 787-25:2019)
Méthodes générales d'essai des pigments et matières de charge - Partie 25:

Comparaison, dans les systèmes monopigmentaires, de la couleur des pigments blancs,

noirs et colorés - Méthode colorimétrique (ISO 787-25:2019)
Ta slovenski standard je istoveten z: EN ISO 787-25:2019
ICS:
87.060.10 Pigmenti in polnila Pigments and extenders
SIST EN ISO 787-25:2019 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
SIST EN ISO 787-25:2019
---------------------- Page: 2 ----------------------
SIST EN ISO 787-25:2019
EN ISO 787-25
EUROPEAN STANDARD
NORME EUROPÉENNE
March 2019
EUROPÄISCHE NORM
ICS 87.060.10 Supersedes EN ISO 787-25:2006
English Version
General methods of test for pigments and extenders - Part
25: Comparison of the colour, in full-shade systems, of
white, black and coloured pigments - Colorimetric method
(ISO 787-25:2019)

Méthodes générales d'essai des pigments et matières Allgemeine Prüfverfahren für Pigmente und Füllstoffe -

de charge - Partie 25: Comparaison, dans les systèmes Vergleich der Farbe von Weiß-, Schwarz- und

monopigmentaires, de la couleur des pigments blancs, Buntpigmenten in Purton-Systemen - Teil 25:

noirs et colorés - Méthode colorimétrique (ISO 787- Farbmetrisches Verfahren (ISO 787-25:2019)

25:2019)
This European Standard was approved by CEN on 15 February 2019.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this

European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references

concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN

member.

This European Standard exists in three official versions (English, French, German). A version in any other language made by

translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management

Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,

Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,

Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,

Turkey and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels

© 2019 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 787-25:2019 E

worldwide for CEN national Members.
---------------------- Page: 3 ----------------------
SIST EN ISO 787-25:2019
EN ISO 787-25:2019 (E)
Contents Page

European foreword ....................................................................................................................................................... 3

---------------------- Page: 4 ----------------------
SIST EN ISO 787-25:2019
EN ISO 787-25:2019 (E)
European foreword

This document (EN ISO 787-25:2019) has been prepared by Technical Committee ISO/TC 256

"Pigments, dyestuffs and extenders" in collaboration with Technical Committee CEN/TC 298 “Pigments

and extenders” the secretariat of which is held by DIN.

This European Standard shall be given the status of a national standard, either by publication of an

identical text or by endorsement, at the latest by September 2019, and conflicting national standards

shall be withdrawn at the latest by September 2019.

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

patent rights. CEN shall not be held responsible for identifying any or all such patent rights.

This document supersedes EN ISO 787-25:2006.

According to the CEN-CENELEC Internal Regulations, the national standards organizations of the

following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,

Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia,

France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta,

Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,

Turkey and the United Kingdom.
Endorsement notice

The text of ISO 787-25:2019 has been approved by CEN as EN ISO 787-25:2019 without any

modification.
---------------------- Page: 5 ----------------------
SIST EN ISO 787-25:2019
---------------------- Page: 6 ----------------------
SIST EN ISO 787-25:2019
INTERNATIONAL ISO
STANDARD 787-25
Second edition
2019-02
General methods of test for pigments
and extenders —
Part 25:
Comparison of the colour, in full-shade
systems, of white, black and coloured
pigments — Colorimetric method
Méthodes générales d'essai des pigments et matières de charge —
Partie 25: Comparaison, dans les systèmes monopigmentaires,
de la couleur des pigments blancs, noirs et colorés — Méthode
colorimétrique
Reference number
ISO 787-25:2019(E)
ISO 2019
---------------------- Page: 7 ----------------------
SIST EN ISO 787-25:2019
ISO 787-25:2019(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2019

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
Fax: +41 22 749 09 47
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2019 – All rights reserved
---------------------- Page: 8 ----------------------
SIST EN ISO 787-25:2019
ISO 787-25:2019(E)
Contents Page

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

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

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

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

4 Principle ........................................................................................................................................................................................................................ 2

5 Materials ....................................................................................................................................................................................................................... 2

5.1 Alkyd resin (binder) ........................................................................................................................................................................... 2

5.2 Fumed silica ............................................................................................................................................................................................... 2

5.3 Preparation of the test medium ............................................................................................................................................... 3

6 Apparatus ..................................................................................................................................................................................................................... 3

7 Sampling ........................................................................................................................................................................................................................ 5

8 Procedure..................................................................................................................................................................................................................... 5

8.1 General ........................................................................................................................................................................................................... 5

8.2 Test portion ................................................................................................................................................................................................ 5

8.2.1 Generals ................................................................................................................................................................................... 5

8.2.2 White pigments ................................................................................................................................................................. 5

8.2.3 Coloured and black pigments ............................................................................................................................... 5

8.3 Preparation of pigment dispersions ..................................................................................................................................... 5

8.4 Preparation of test specimens ................................................................................................................................................... 6

8.4.1 General...................................................................................................................................................................................... 6

8.4.2 White pigments ................................................................................................................................................................. 6

8.4.3 Coloured and black pigments ............................................................................................................................... 6

8.5 Measurement ............................................................................................................................................................................................ 6

9 Expression of results ........................................................................................................................................................................................ 7

9.1 White pigments and black pigments .................................................................................................................................... 7

9.1.1 Relative hue .......................................................................................................................................................................... 7

9.1.2 Amount of relative hue ............................................................................................................................................... 8

9.2 Lightness difference ........................................................................................................................................................................... 8

9.3 Coloured pigments............................................................................................................................................................................... 8

10 Test report ................................................................................................................................................................................................................... 8

Bibliography ................................................................................................................................................................................................................................ 9

© ISO 2019 – All rights reserved iii
---------------------- Page: 9 ----------------------
SIST EN ISO 787-25:2019
ISO 787-25:2019(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 256, Pigments, dyestuffs and extenders.

This second edition cancels and replaces the first edition (ISO 787-25:1993), which has been technically

revised. The main changes compared to the previous edition are as follows:

— Clause 3 has been revised and terms and definitions for full shade, mass tone and mass tone system

have been added/revised;
— the normative references have been updated;
— the text has been editorially revised.
A list of all parts in the ISO 787 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 2019 – All rights reserved
---------------------- Page: 10 ----------------------
SIST EN ISO 787-25:2019
INTERNATIONAL STANDARD ISO 787-25:2019(E)
General methods of test for pigments and extenders —
Part 25:
Comparison of the colour, in full-shade systems, of white,
black and coloured pigments — Colorimetric method
1 Scope

This document specifies a general test method for comparing the colour, in full-shade systems, of white,

black or coloured pigments with that of an agreed reference pigment, using a colorimetric procedure.

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 787-9, General methods of test for pigments and extenders — Part 9: Determination of pH value of an

aqueous suspension

ISO 787-24, General methods of test for pigments and extenders — Part 24: Determination of relative tinting

strength of coloured pigments and relative scattering power of white pigments — Photometric methods

ISO 2114, Plastics (po
...

Questions, Comments and Discussion

Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.