ISO 787-1
(Main)General methods of test for pigments and extenders — Part 1: Comparison of colour of pigments
- Abstract
Procedure for comparing the colour of a coloured pigment with that of an agreed sample. The procedures described in this document are acceptable but the method using an automatic muller is the reference method. The binder is not specified. It shall be agreed between the interested parties. If no binder is agreed, linseed oil, complying with the specification in ISO 150, should be used. - Replaces ISO/R 787/1:1968.
- Status
- Not Published
- Technical Committee
- ISO/TC 256 - Pigments, dyestuffs and extenders
- Drafting Committee
- ISO/TC 256/WG 3 - General test methods for colorants and extenders
- Current Stage
- 6000 - International Standard under publication
- Start Date
- 24-Oct-2026
- Completion Date
- 24-Oct-2026
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ISO/FDIS 787-1 - General methods of test for pigments and extenders — Part 1: Comparison of colour of pigments
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ISO/FDIS 787-1 - Méthodes générales d'essai des pigments et matières de charge — Partie 1: Comparaison de la couleur des pigments
ISO 787-1 is an International Standard from ISO for comparing the colour of a coloured pigment with an agreed sample. It sets out a general test method for pigments and extenders, with the automatic muller as the reference method and either visual or instrumental colour comparison for laboratories and manufacturers.
What does ISO 787-1 specify?
ISO 787-1 specifies a general method for comparing the colour of a coloured pigment with that of an agreed sample. The document also gives the structure of the method: apparatus and materials, sampling, preparation of the dispersion, colour comparison, and the test report.
The binder is chosen by agreement between the interested parties. If no binder is agreed, acid-refined linseed oil complying with ISO 150 is used, so the same medium can be used consistently when the test conditions have not been set in advance.
What are the key requirements of ISO 787-1?
Clause 5 - Sampling: ISO 787-1 requires a representative sample taken in accordance with ISO 15528. In practice, the colour result is only meaningful if the test sample truly represents the batch or lot being checked.
Clause 4 - Apparatus and materials: ISO 787-1 specifies ordinary laboratory equipment plus a palette knife, substrate, burette, muller, plate and binder. This matters because the comparison depends on making pastes of similar consistency and applying them in a controlled way.
Clause 4.6 - Binder selection: ISO 787-1 requires the binder to be agreed between the interested parties, with acid-refined linseed oil from ISO 150 used when no binder is specified. That lets the method be applied across different agreements while keeping the test medium defined.
Clause 6.1 - Reference method: ISO 787-1 accepts two preparation procedures, but the automatic muller method is the reference method. In practice, this is the procedure to use when results need the strongest basis for comparison.
Clause 6.2 - Automatic muller procedure: ISO 787-1 requires the pigment and binder to be mixed, ground in stages, and prepared alongside the agreed sample under the same force and grinding conditions. This keeps the two pastes comparable, which is the core of the test.
Clause 6.3 - Hand muller or palette knife procedure: ISO 787-1 also allows manual preparation, with the test portion weighed and rubbed out in repeated stages until the paste is homogeneous. This gives a practical alternative when an automatic muller is not available.
Clause 7 - Colour comparison: ISO 787-1 calls for the two pastes to be spread as opaque strips on a substrate and compared visually in diffuse daylight, preferably artificial daylight, using ISO 3668. By agreement, a colorimeter may be used instead, with colour differences calculated according to ISO 18314-1 and ISO/CIE 11664-4, and total colour difference reported using ISO/CIE 11664-6 or ISO 18314-5. This gives users a shared visual method or a numerical alternative.
Clause 8 - Test report: ISO 787-1 requires the report to identify the pigment, binder, procedure used, comparison details, result, deviations, anomalies and date. That makes the result traceable and easier to audit or repeat.
What terms does ISO 787-1 define?
- Pigment - The coloured material being tested against the agreed sample.
- Agreed sample - The reference pigment sample used as the colour match for comparison.
- Binder - The liquid or medium mixed with the pigment to make the paste for testing.
- Automatic muller - The reference grinding device used to prepare the pigment dispersion under controlled force and motion.
- Hand muller - The manual grinding device allowed as an alternative preparation tool.
- Substrate - The surface on which the two prepared pastes are spread for colour comparison.
- Colorimeter - An instrument that may be used by agreement to compare colour numerically instead of by eye.
Who uses ISO 787-1?
ISO 787-1 is used by pigment manufacturers, laboratories, quality control teams, and buyers who need to compare the colour of pigments against an agreed reference. It is also relevant in the paints and varnishes field, where pigments are tested as raw materials and colour consistency is checked during incoming inspection, batch release, dispute resolution, or supplier qualification.
What changed in ISO 787-1 from the previous edition?
ISO 787-1 is a second edition that cancels and replaces ISO 787-1:1982. The stated changes are the addition of Clause 3 on terms and definitions, the addition of the colorimeter method in Clause 7, and updated normative references.
Which standards are used with ISO 787-1?
| Standard | What it contributes |
|---|---|
| ISO 150:2018 | Specification and test methods for the linseed oil used when no binder is agreed |
| ISO 3668 | Procedure for visual colour comparison of paints, used here for the colour comparison step |
| ISO 15528 | Sampling method for paints, varnishes and raw materials, used for taking a representative pigment sample |
| ISO 18314-1 | Practical colour measurement procedure used when a colorimeter is applied |
| ISO 18314-5 | Procedure for calculating colour differences in equidistant colour spaces |
| ISO 18451-1 | General terminology for pigments, dyestuffs and extenders |
| ISO/CIE 11664-4 | CIE 1976 Lab* colour space for calculating component colour differences |
| ISO/CIE 11664-6 | CIEDE2000 colour-difference formula for total colour difference |
What does the ISO 787-1 document contain?
ISO 787-1 contains the equipment list, the sampling instruction, two alternative dispersion procedures, the colour comparison method, and the test report requirements. Clause 4 gives the apparatus and materials needed for the test, including the grinding equipment and substrate.
Clause 6 provides the practical preparation steps for both the automatic muller and the hand muller or palette knife route. Clause 7 explains how to compare the two prepared pastes visually, and it also allows instrumental comparison by agreement.
Clause 8 lists the information that must be recorded in the test report, so the result can be traced back to the pigment, the binder, the method used, and any deviations or unusual observations.
Relations
- Effective Date
- 12-Feb-2026
- Effective Date
- 07-Jan-2025
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ISO/FDIS 787-1 - Méthodes générales d'essai des pigments et matières de charge — Partie 1: Comparaison de la couleur des pigments
Frequently Asked Questions
ISO 787-1 is a draft published by the International Organization for Standardization (ISO). Its full title is "General methods of test for pigments and extenders — Part 1: Comparison of colour of pigments". This standard covers: Procedure for comparing the colour of a coloured pigment with that of an agreed sample. The procedures described in this document are acceptable but the method using an automatic muller is the reference method. The binder is not specified. It shall be agreed between the interested parties. If no binder is agreed, linseed oil, complying with the specification in ISO 150, should be used. - Replaces ISO/R 787/1:1968.
Procedure for comparing the colour of a coloured pigment with that of an agreed sample. The procedures described in this document are acceptable but the method using an automatic muller is the reference method. The binder is not specified. It shall be agreed between the interested parties. If no binder is agreed, linseed oil, complying with the specification in ISO 150, should be used. - Replaces ISO/R 787/1:1968.
ISO 787-1 is classified under the following ICS (International Classification for Standards) categories: 87.060.10 - Pigments and extenders. The ICS classification helps identify the subject area and facilitates finding related standards.
ISO 787-1 has the following relationships with other standards: It is inter standard links to FprEN ISO 787-1, ISO 787-1:1982. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
ISO 787-1 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
Standards Content (Sample)
FINAL DRAFT
International
Standard
ISO/FDIS 787-1
ISO/TC 256
General methods of test for
Secretariat: DIN
pigments and extenders —
Voting begins on:
2026-08-28
Part 1:
Comparison of colour of pigments
Voting terminates on:
2026-10-23
Méthodes générales d'essai des pigments et matières de charge —
Partie 1: Comparaison de la couleur des pigments
RECIPIENTS OF THIS DRAFT ARE INVITED TO SUBMIT,
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INTERNATIONAL STANDARDS MAY ON OCCASION HAVE
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MADE IN NATIONAL REGULATIONS.
Reference number
ISO/FDIS 787-1:2026(en) © ISO 2026
FINAL DRAFT
ISO/FDIS 787-1:2026(en)
International
Standard
ISO/FDIS 787-1
ISO/TC 256
General methods of test for
Secretariat: DIN
pigments and extenders —
Voting begins on:
Part 1:
Comparison of colour of pigments
Voting terminates on:
Méthodes générales d'essai des pigments et matières de charge —
Partie 1: Comparaison de la couleur des pigments
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.
© ISO 2026
IN ADDITION TO THEIR EVALUATION AS
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO-
ISO/CEN PARALLEL PROCESSING
LOGICAL, COMMERCIAL AND USER PURPOSES, DRAFT
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
INTERNATIONAL STANDARDS MAY ON OCCASION HAVE
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
TO BE CONSIDERED IN THE LIGHT OF THEIR POTENTIAL
or ISO’s member body in the country of the requester.
TO BECOME STAN DARDS TO WHICH REFERENCE MAY BE
MADE IN NATIONAL REGULATIONS.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
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Published in Switzerland Reference number
ISO/FDIS 787-1:2026(en) © ISO 2026
ii
ISO/FDIS 787-1:2026(en)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Apparatus and materials . 1
5 Sampling . 2
6 Procedure . 2
6.1 General .2
6.2 Procedure using an automatic muller.2
6.2.1 Test portion .2
6.2.2 Preparation of pigment dispersion .2
6.3 Procedure using a hand muller or palette knife .3
6.3.1 Test portion .3
6.3.2 Preparation of pigment dispersion .3
7 Colour comparison . 3
8 Test report . 3
iii
ISO/FDIS 787-1:2026(en)
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 document 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).
ISO draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). ISO takes no position concerning the evidence, validity or applicability of any claimed patent
rights in respect thereof. As of the date of publication of this document, ISO had not received notice of (a)
patent(s) which may be required to implement this document. However, implementers are cautioned that
this may not represent the latest information, which may be obtained from the patent database available at
www.iso.org/patents. ISO shall not be held responsible for identifying any or all such patent rights.
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, in
collaboration with the European Committee for Standardization (CEN) Technical Committee CEN/TC 298,
Pigments and extenders, in accordance with the Agreement on technical cooperation between ISO and CEN
(Vienna Agreement).
This second edition cancels and replaces the first edition (ISO 787-1:1982), which has been technically
revised.
The main changes are as follows:
— Clause 3 on terms and definitions has been added;
— in Clause 7, the colorimeter method has been added for colour measurement and colour comparison;
— the normative references have been updated.
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
FINAL DRAFT Internationa
...
ISO/DISFDIS 787-1:2026(en)
ISO/TC 256
Secretariat: DIN
Date: 2026-06-0908-13
General methods of test for pigments and extenders —
Part 1:
Comparison of colour of pigments
Méthodes générales d'essai des pigments et matières de charge —
Partie 1: Comparaison de la couleur des pigments
FDIS stage
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ISO/FDIS 787-1:2026(en)
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
EmailE-mail: copyright@iso.org
Website: www.iso.org
Published in Switzerland
© ISO #### 2026 – All rights reserved
ii
ISO/DISFDIS 787-1:2026(en)
Contents
Foreword . iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Apparatus and materials . 1
5 Sampling . 2
6 Procedure . 2
6.1 General. 2
6.2 Procedure using an automatic muller . 2
6.3 Procedure using a hand muller or palette knife . 3
7 Colour comparison . 3
8 Test report . 4
iii
ISO/FDIS 787-1:2026(en)
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 document 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).
ISO draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). ISO takes no position concerning the evidence, validity or applicability of any claimed patent rights
in respect thereof. As of the date of publication of this document, ISO had not received notice of (a) patent(s)
which may be required to implement this document. However, implementers are cautioned that this may not
represent the latest information, which may be obtained from the patent database available at
www.iso.org/patents. ISO shall not be held responsible for identifying any or all such patent rights.
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, in
collaboration with the European Committee for Standardization (CEN) Technical Committee CEN/TC 298,
Pigments and extenders, in accordance with the Agreement on technical cooperation between ISO and CEN
(Vienna Agreement).
This second edition cancels and replaces the first edition (ISO 787-1:1982), which has been technically
revised.
The main changes are as follows:
— Clause 3— Clause 3 on terms and definitions has been added;
— — in Clause 7Clause 7,, the colorimeter method has been added for colour measurement and colour
comparison;
— — the normative references have been updated.
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.
© ISO #### 2026 – All rights reserved
iv
DRAFT International Standard ISO/DIS 787-1:2026(en)
General methods of test for pigments and extenders —
Part 1:
Comparison of colour of pigments
1 Scope
This document specifies a general method of test for comparing the colour of a coloured pigment with that of
an agreed sample.
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 150:2018, Raw, refined and boiled linseed oil for paints and varnishes — Specifications and methods of test
ISO 3668, Paints and varnishes — Visual comparison of colour of paints
ISO 15528, Paints, varnishes and raw materials for paints and varnishes — Sampling
ISO 18314--1, Analytical colorimetry — Part 1: Practical colour measurement
ISO 18314--5, Analytical colorimetry — Part 5: Procedure for colorimetric determination of colour differences
of object colours according to equidistant colour spaces
ISO 18451--1, Pigments, dyestuffs and extenders — Terminology — Part 1: General terms
ISO/CIE 11664--4, Colorimetry — Part 4: CIE 1976 L*a*b* colour space
ISO/CIE 11664--6, Colorimetry — Part 6: CIEDE2000 colour-difference formula
3 Terms and
...
PROJET FINAL
Norme
internationale
ISO/FDIS 787-1
ISO/TC 256
Méthodes générales d'essai des
Secrétariat: DIN
pigments et matières de charge —
Début de vote:
2026-08-28
Partie 1:
Comparaison de la couleur des
Vote clos le:
2026-10-23
pigments
General methods of test for pigments and extenders —
Part 1: Comparison of colour of pigments
LES DESTINATAIRES DU PRÉSENT PROJET SONT
INVITÉS À PRÉSENTER, AVEC LEURS OBSERVATIONS,
NOTIFICATION DES DROITS DE PROPRIÉTÉ DONT ILS
AURAIENT ÉVENTUELLEMENT CONNAISSANCE ET À
FOURNIR UNE DOCUMENTATION EXPLICATIVE.
OUTRE LE FAIT D’ÊTRE EXAMINÉS POUR
ÉTABLIR S’ILS SONT ACCEPTABLES À DES FINS
INDUSTRIELLES, TECHNOLOGIQUES ET COM-MERCIALES,
AINSI QUE DU POINT DE VUE DES UTILISATEURS, LES
PROJETS DE NORMES
TRAITEMENT PARALLÈLE ISO/CEN
INTERNATIONALES DOIVENT PARFOIS ÊTRE CONSIDÉRÉS
DU POINT DE VUE DE LEUR POSSI BILITÉ DE DEVENIR DES
NORMES POUVANT
SERVIR DE RÉFÉRENCE DANS LA RÉGLEMENTATION
NATIONALE.
Numéro de référence
ISO/FDIS 787-1:2026(fr) © ISO 2026
PROJET FINAL
ISO/FDIS 787-1:2026(fr)
Norme
internationale
ISO/FDIS 787-1
ISO/TC 256
Méthodes générales d'essai des
Secrétariat: DIN
pigments et matières de charge —
Début de vote:
Partie 1: 2026-08-28
Comparaison de la couleur des
Vote clos le:
2026-10-23
pigments
General methods of test for pigments and extenders —
Part 1: Comparison of colour of pigments
LES DESTINATAIRES DU PRÉSENT PROJET SONT
INVITÉS À PRÉSENTER, AVEC LEURS OBSERVATIONS,
NOTIFICATION DES DROITS DE PROPRIÉTÉ DONT ILS
AURAIENT ÉVENTUELLEMENT CONNAISSANCE ET À
FOURNIR UNE DOCUMENTATION EXPLICATIVE.
DOCUMENT PROTÉGÉ PAR COPYRIGHT
OUTRE LE FAIT D’ÊTRE EXAMINÉS POUR
ÉTABLIR S’ILS SONT ACCEPTABLES À DES FINS
© ISO 2026 INDUSTRIELLES, TECHNOLOGIQUES ET COM-MERCIALES,
AINSI QUE DU POINT DE VUE DES UTILISATEURS, LES
Tous droits réservés. Sauf prescription différente ou nécessité dans le contexte de sa mise en œuvre, aucune partie de cette
PROJETS DE NORMES
TRAITEMENT PARALLÈLE ISO/CEN
INTERNATIONALES DOIVENT PARFOIS ÊTRE CONSIDÉRÉS
publication ne peut être reproduite ni utilisée sous quelque forme que ce soit et par aucun procédé, électronique ou mécanique,
DU POINT DE VUE DE LEUR POSSI BILITÉ DE DEVENIR DES
y compris la photocopie, ou la diffusion sur l’internet ou sur un intranet, sans autorisation écrite préalable. Une autorisation peut
NORMES POUVANT
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SERVIR DE RÉFÉRENCE DANS LA RÉGLEMENTATION
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ISO copyright office
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Tél.: +41 22 749 01 11
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Publié en Suisse Numéro de référence
ISO/FDIS 787-1:2026(fr) © ISO 2026
ii
ISO/FDIS 787-1:2026(fr)
Sommaire Page
Avant-propos .iv
1 Domaine d'application . 1
2 Références normatives . 1
3 Termes et définitions . 1
4 Appareillage et matériaux . 1
5 Échantillonnage . 2
6 Mode opératoire . 2
6.1 Généralités .2
6.2 Mode opératoire utilisant une broyeuse automatique .2
6.2.1 Prise d'essai .2
6.2.2 Préparation de la dispersion de pigments .2
6.3 Mode opératoire utilisant une molette manuelle ou un couteau à palette .3
6.3.1 Prise d'essai .3
6.3.2 Préparation de la dispersion de pigments .3
7 Comparaison de la couleur. 3
8 Rapport d'essai . 4
iii
ISO/FDIS 787-1:2026(fr)
Avant-propos
L'ISO (Organisation internationale de normalisation) est une fédération mondiale d'organismes nationaux
de normalisation (comités membres de l'ISO). L'élaboration des Normes internationales est en général
confiée aux comités techniques de l'ISO. Chaque comité membre intéressé par une étude a le droit de faire
partie du comité technique créé à cet effet. Les organisations internationales, gouvernementales et non
gouvernementales, en liaison avec l'ISO participent également aux travaux. L'ISO collabore étroitement avec
la Commission électrotechnique internationale (IEC) en ce qui concerne la normalisation électrotechnique.
Les procédures utilisées pour élaborer le présent document et celles destinées à sa mise à jour sont
décrites dans les Directives ISO/IEC, Partie 1. Il convient, en particulier, de prendre note des différents
critères d'approbation requis pour les différents types de documents ISO. Le présent document
a été rédigé conformément aux règles de rédaction données dans les Directives ISO/IEC, Partie 2
(voir www.iso.org/directives).
L'ISO attire l'attention sur le fait que la mise en application du présent document peut entraîner l'utilisation
d'un ou de plusieurs brevets. L'ISO ne prend pas position quant à la preuve, à la validité et à l'applicabilité
de tout droit de propriété revendiqué à cet égard. À la date de publication du présent document, l'ISO
n’avait pas reçu notification qu'un ou plusieurs brevets pouvaient être nécessaires à sa mise en application.
Toutefois, il y a lieu d'avertir les responsables de la mise en application du présent document que des
informations plus récentes sont susceptibles de figurer dans la base de données de brevets, disponible à
l'adresse www.iso.org/brevets. L'ISO ne saurait être tenue pour responsable de ne pas avoir identifié de tels
droits de brevet.
Les appellations commerciales éventuellement mentionnées dans le présent document sont données pour
information, par souci de commodité, à l'intention des utilisateurs et ne sauraient constituer un engagement.
Pour une explication de la nature volontaire des normes, la signification des termes et expressions
spécifiques de l'ISO liés à l'évaluation de la conformité, ou pour toute information au sujet de l'adhésion de
l'ISO aux principes de l'Organisation mondiale du commerce (OMC) concernant les obstacles techniques au
commerce (OTC), voir le lien suivant: www.iso.org/avant-propos.
Le présent document a été élaboré par le comité technique ISO/TC 256, Pigments, colorants et matières de
charge, en collaboration avec le comité technique CEN/TC 298, Pigments et matières de charge du Comité
européen de normalisation (CEN), conformément à l'Accord de coopération technique entre l'ISO et le CEN
(Accord de Vienne).
Cette seconde édition annule et remplace la première édition (ISO 787-1:1982), qui a fait l’objet d’une révision
technique.
Les principales modifications sont les suivantes:
— l’Article 3, Termes et définitions, a été ajouté;
— à l'Article 7, la méthode du colorimètre a été ajoutée pour le mesurage et la comparaison des couleurs;
— les références normatives ont été mises à jour.
Une liste de toutes les parties de la série ISO 787 se trouve sur le site web de l’ISO.
Il convient que l’utilisateur adresse tout retour d’information ou toute question concernant le présent
document à l’organisme national de normalisation de son pays. Une liste exhaustive desdits organismes se
trouve à l’adresse www.iso.org/members.html.
iv
PROJET FINAL Norme internationale ISO/FDIS 787-1:2026(fr)
Méthodes générales d'essai des pigments et matières de
charge —
Partie 1:
Comparaison de la couleur des pigments
1 Domaine d'application
Le présent document spécifie une méthode générale d'essai permettant de comparer la couleur d'un pigment
de couleur avec celle d'un échantillon agréé.
2 Références normatives
Les documents suivants sont cités dans le texte de s
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