EN ISO 787-25:2019

SLOVENSKI STANDARD
01-maj-2019
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SIST EN ISO 787-25:2007
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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
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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.

Contents Page
European foreword . 3

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.
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
ISO 787-25:2019(E)
© 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
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below or ISO’s member body in the country of the requester.
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Published in Switzerland
ii © ISO 2019 – All rights reserved

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 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 ex
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