kSIST FprEN ISO 787-1:2026

• 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
• Public Enquiry End Date: 01-Jun-2026
• ICS: 87.060.10 - Pigments and extenders
• Technical Committee: PIP - Pigments and extenders
• Current Stage: 5020 - Formal vote (FV) (Adopted Project)
• Start Date: 09-Sep-2026
• Due Date: 28-Oct-2026
• Ref Project: FprEN ISO 787-1 - General methods of test for pigments and extenders - Part 1: Comparison of colour of pigments (ISO/FDIS 787-1:2026)

• Revises: SIST EN ISO 787-1:2018 - General methods of test for pigments and extenders - Part 1: Comparison of colour of pigments (ISO 787-1:1982)
• Effective Date: 01-May-2026

Overview

kSIST FprEN ISO 787-1:2026 – General methods of test for pigments and extenders – Part 1: Comparison of colour of pigments – establishes a standardized procedure for comparing the colour of coloured pigments with an agreed reference sample. Published by SIST, this standard provides guidance on the main testing methods, including the preferred use of an automatic muller for preparing pigment dispersions. The standard specifies that the binder used should be mutually agreed by the involved parties; when no agreement is reached, linseed oil complying with ISO 150 is recommended.

This edition updates and replaces ISO/R 787/1:1968, reflecting advances in measurement techniques and referencing the latest normative documents covering sampling, visual and instrumental colour comparison, and terminology for pigments and extenders.

Key Topics

The document covers essential aspects of colour comparison methods for pigments:

• Sample Preparation: Procedures for producing representative test portions and pigment dispersions, either with an automatic muller (reference method) or by hand instruments (muller or palette knife), ensuring reproducible and unbiased results.
• Use of Binders: Guidance on the selection and application of binders, with a default to refined linseed oil in the absence of a specific agreement.
• Visual and Instrumental Comparison: Step-by-step instructions for evaluating test and agreed samples on standard substrates, using visual assessment (preferably with artificial daylight as outlined in ISO 3668) and, optionally, instrumental colorimetry (referencing ISO 18314-1, ISO/CIE 11664-4, and related standards).
• Reporting Requirements: Details on test reporting, including identification of sample, binder used, method employed, comparison results, and any anomalies or deviations.

Applications

ISO 787-1:2026 is widely used in industries where consistent and objective colour quality of pigments is critical, supporting activities such as:

• Quality Control: Ensuring batch-to-batch colour consistency in the manufacture of pigments, paints, and coatings.
• Product Development: Benchmarking new pigment batches against reference samples to verify equivalence or improvement.
• Supplier and Customer Agreements: Forming the basis for acceptance criteria between pigment suppliers and users by providing a standard comparison methodology.
• Regulatory and Compliance Documentation: Offering a recognized procedure for internal and external audits, and compliance with international trade requirements related to pigment colour uniformity.

The use of this standard helps organizations minimize disputes, improve reproducibility in colour evaluation, and streamline communication of colour measurement results.

Related Standards

kSIST FprEN ISO 787-1:2026 references and complements several important standards in pigment and colour measurement, including:

• ISO 150: 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 – Sampling
• ISO 18314-1 / ISO 18314-5: Analytical colorimetry for practical colour measurement and determination of colour differences
• ISO 18451-1: Pigments, dyestuffs and extenders – Terminology
• ISO/CIE 11664-4 & ISO/CIE 11664-6: Colorimetry and colour-difference calculation

All these documents contribute to a cohesive approach for achieving accurate, reliable, and repeatable pigment colour comparison results, supporting quality assurance and regulatory compliance in the pigments and coatings industries.

For professionals in pigment manufacturing, paint formulation, and materials testing, adherence to ISO 787-1:2026 enhances colour matching accuracy, supports international trade, and strengthens product quality claims.

SLOVENSKI STANDARD
oSIST prEN ISO 787-1:2026
01-maj-2026
Splošne preskusne metode za pigmente in polnila - 1. del: Primerjava barve
pigmentov (ISO/DIS 787-1:2026)
General methods of test for pigments and extenders - Part 1: Comparison of colour of
pigments (ISO/DIS 787-1:2026)
Allgemeine Prüfverfahren für Pigmente und Füllstoffe - Teil 1: Farbvergleich von
Pigmenten (ISO/DIS 787-1:2026)
Méthodes générales d'essai des pigments et matières de charge - Partie 1:
Comparaison de la couleur des pigments (ISO/DIS 787-1:2026)
Ta slovenski standard je istoveten z: prEN ISO 787-1
ICS:
87.060.10 Pigmenti in polnila Pigments and extenders
oSIST prEN ISO 787-1:2026 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

oSIST prEN ISO 787-1:2026
oSIST prEN ISO 787-1:2026
DRAFT
International
Standard
ISO/DIS 787-1
ISO/TC 256
General methods of test for
Secretariat: DIN
pigments and extenders —
Voting begins on:
Part 1: 2026-03-24
Comparison of colour of pigments
Voting terminates on:
2026-06-16
Méthodes générales d'essai des pigments et matières de charge —
Partie 1: Comparaison de la couleur des pigments
ICS: 87.060.10
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENTS AND APPROVAL. IT
IS THEREFORE SUBJECT TO CHANGE
AND MAY NOT BE REFERRED TO AS AN
INTERNATIONAL STANDARD UNTIL
PUBLISHED AS SUCH.
This document is circulated as received from the committee secretariat.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL,
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
STANDARDS MAY ON OCCASION HAVE TO
ISO/CEN PARALLEL PROCESSING
BE CONSIDERED IN THE LIGHT OF THEIR
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
NATIONAL REGULATIONS.
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 SUPPORTING DOCUMENTATION.
Reference number
ISO/DIS 787-1:2026(en)
oSIST prEN ISO 787-1:2026
DRAFT
ISO/DIS 787-1:2026(en)
International
Standard
ISO/DIS 787-1
ISO/TC 256
General methods of test for
Secretariat: DIN
pigments and extenders —
Voting begins on:
Part 1:
2026-03-24
Comparison of colour of pigments
Voting terminates on:
2026-06-16
Méthodes générales d'essai des pigments et matières de charge —
Partie 1: Comparaison de la couleur des pigments
ICS: 87.060.10
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENTS AND APPROVAL. IT
IS THEREFORE SUBJECT TO CHANGE
AND MAY NOT BE REFERRED TO AS AN
INTERNATIONAL STANDARD UNTIL
PUBLISHED AS SUCH.
This document is circulated as received from the committee secretariat.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL,
© ISO 2026
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
STANDARDS MAY ON OCCASION HAVE TO
ISO/CEN PARALLEL PROCESSING
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
BE CONSIDERED IN THE LIGHT OF THEIR
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
or ISO’s member body in the country of the requester.
NATIONAL REGULATIONS.
ISO copyright office
RECIPIENTS OF THIS DRAFT ARE INVITED
CP 401 • Ch. de Blandonnet 8
TO SUBMIT, WITH THEIR COMMENTS,
CH-1214 Vernier, Geneva
NOTIFICATION OF ANY RELEVANT PATENT
Phone: [phone]
RIGHTS OF WHICH THEY ARE AWARE AND TO
PROVIDE SUPPORTING DOCUMENTATION.
Email: [e-mail]
Website: www.iso.org
Published in Switzerland Reference number
ISO/DIS 787-1:2026(en)
ii
oSIST prEN ISO 787-1:2026
ISO/DIS 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 for sample generation . 2
6.1 Procedure using an automatic muller.2
6.1.1 Test portion .2
6.1.2 Preparation of pigment dispersion .2
6.2 Procedure using a hand muller or palette knife .3
6.2.1 Test portion .3
6.2.2 Preparation of pigment dispersion .3
7 Colour comparison . 3
8 Test report . 3

iii
oSIST prEN ISO 787-1:2026
ISO/DIS 787-1:2026(en)
Foreword
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bodies (ISO member bodies). The work of preparing International Standards is normally carried out through
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in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the different types
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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).
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