SIST EN ISO 787-5:2026
(Main)General methods of test for pigments and extenders - Part 5: Determination of oil absorption value (ISO 787-5:2026)
General methods of test for pigments and extenders - Part 5: Determination of oil absorption value (ISO 787-5:2026)
This document specifies a general method of test for determining the oil absorption value of a sample of pigment or extender. The oil absorption value is usually required to be compared with the value determined at the same time on an agreed sample of the product.
Allgemeine Prüfverfahren für Pigmente und Füllstoffe - Teil 5: Bestimmung der Ölzahl (ISO 787-5:2026)
Méthodes générales d'essai des pigments et matières de charge - Partie 5: Détermination de l'indice d'huile (ISO 787-5:2026)
La présente partie de l'ISO 787 spécifie une méthode générale d'essai pour la détermination de la prise d'huile d'un pigment ou d'une matière de charge. La prise d'huile est généralement nécessaire pour être comparée avec la valeur déterminée au même moment sur un échantillon agréé de produit.
NOTE -- Chaque fois que cette méthode générale est applicable pour un pigment ou une matière de charge donné(e), il devra simplement y être fait référence dans la Norme internationale relative à ce pigment ou cette matière de charge, et il devra être mentionné, dans une note, toutes les modifications de détail qui peuvent être nécessaires en raison des propriétés spéciales du produit considéré. Ce n'est que dans le cas où une telle méthode générale ne serait pas applicable à un produit particulier, qu'il deviendrait nécessaire de spécifier une méthode spéciale pour la détermination de la prise d'huile.
Splošne preskusne metode za pigmente in polnila - 5. del: Določanje oljnega števila (ISO 787-5:2026)
Ta dokument določa splošno preskusno metodo za določanje vrednosti absorpcije olja vzorca pigmenta ali polnila. Vrednost absorpcije olja je običajno potrebna za primerjavo z vrednostjo, določeno istočasno na dogovorjenem vzorcu izdelka.
General Information
- Status
- Published
- Public Enquiry End Date
- 30-Nov-2025
- Publication Date
- 13-Apr-2026
- Technical Committee
- PIP - Pigments and extenders
- Current Stage
- 6060 - National Implementation/Publication (Adopted Project)
- Start Date
- 08-Apr-2026
- Due Date
- 13-Jun-2026
- Completion Date
- 14-Apr-2026
Relations
- Effective Date
- 01-May-2026
Overview
The oSIST prEN ISO 787-5:2025:2025 standard specifies the general methods for determining the oil absorption value of pigments and extenders. This test method is essential for assessing how much refined linseed oil a pigment or extender sample absorbs under defined conditions. The oil absorption value is a critical quality parameter in industries such as paint, varnish, and coatings production, impacting the handling, texture, and application properties of pigments and extenders.
This standard supersedes the previous ISO 787-5:1980, incorporating updated procedures, additional testing methods, and refined measurement accuracy. It ensures a consistent, reliable approach to comparing pigment and extender products by quantifying their oil absorption using controlled laboratory techniques.
Key Topics
Test Principle: The oil absorption value is determined by gradually adding linseed oil to a measured sample of pigment or extender. The oil is mixed in until a smooth, paste-like consistency forms that spreads without cracking or crumbling.
Reagents and Apparatus:
- Refined linseed oil compliant with ISO 150 standards, with a specific acid value and density.
- Testing plate made of ground glass or marble.
- Palette knife for mixing.
- Precise burette or dropping bottle fitted with a pipette for oil addition.
- Analytical balance accurate to 0.001 g or better.
Test Procedure:
- Samples and reagents are conditioned at 23 ± 2 °C and 50 ± 5% relative humidity.
- The test is performed in duplicate for reliability.
- Two addition methods are outlined: the burette method and the dropping bottle method.
- The oil is added gradually, first in drops and then one drop at a time when conglomerates form.
- The endpoint is the formation of a paste just capable of spreading smoothly.
Result Expression:
- Results are given as millilitres or grams of oil absorbed per 100 grams of pigment or extender.
- Specific formulae are used to convert pipetted volume and weight measurements into oil absorption values.
Quality Control: Comparison to an agreed sample tested simultaneously is recommended to ensure consistency.
Applications
The oSIST prEN ISO 787-5:2025:2025 standard provides practical value across multiple industries where pigments and extenders are integral:
- Paints and Coatings Manufacturing: Helps determine pigment compatibility and optimum formulation by understanding oil absorption behaviour.
- Raw Material Quality Assurance: Enables manufacturers and suppliers to ensure product conformity and consistency.
- Research and Development: Supports formulation scientists in developing new pigment and extender blends with desired texture and spreadability.
- Regulatory Compliance: Facilitates adherence to international quality and testing standards for pigments and extenders.
The accurate determination of oil absorption influences product performance, drying time, durability, and application characteristics, making this test critical in industrial processes.
Related Standards
oSIST prEN ISO 787-5:2025:2025 references and complements other key ISO standards related to pigments, extenders, and raw materials testing:
- ISO 150: Specifications for raw, refined, and boiled linseed oil, ensuring reagent quality.
- ISO 385: Requirements for burettes used in volumetric measurement.
- ISO 2811-1 & ISO 2811-3: Methods for determining density of paints and varnishes, essential for calculating oil absorption by mass.
- ISO 15528: Guidelines for sampling paints, varnishes, and raw materials to ensure representative testing.
Together, these standards provide a robust framework for comprehensive testing and quality control in pigment and extender applications.
By standardizing the determination of oil absorption value, oSIST prEN ISO 787-5:2025:2025 plays a vital role in supporting consistent product quality, performance predictability, and compliance in pigment and extender testing worldwide.
Frequently Asked Questions
SIST EN ISO 787-5:2026 is a standard published by the Slovenian Institute for Standardization (SIST). Its full title is "General methods of test for pigments and extenders - Part 5: Determination of oil absorption value (ISO 787-5:2026)". This standard covers: This document specifies a general method of test for determining the oil absorption value of a sample of pigment or extender. The oil absorption value is usually required to be compared with the value determined at the same time on an agreed sample of the product.
This document specifies a general method of test for determining the oil absorption value of a sample of pigment or extender. The oil absorption value is usually required to be compared with the value determined at the same time on an agreed sample of the product.
SIST EN ISO 787-5:2026 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.
SIST EN ISO 787-5:2026 has the following relationships with other standards: It is inter standard links to SIST EN ISO 787-5:1997. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
SIST EN ISO 787-5:2026 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)
SLOVENSKI STANDARD
01-maj-2026
Nadomešča:
SIST EN ISO 787-5:1997
Splošne preskusne metode za pigmente in polnila - 5. del: Določanje oljnega
števila (ISO 787-5:2026)
General methods of test for pigments and extenders - Part 5: Determination of oil
absorption value (ISO 787-5:2026)
Allgemeine Prüfverfahren für Pigmente und Füllstoffe - Teil 5: Bestimmung der Ölzahl
(ISO 787-5:2026)
Méthodes générales d'essai des pigments et matières de charge - Partie 5:
Détermination de l'indice d'huile (ISO 787-5:2026)
Ta slovenski standard je istoveten z: EN ISO 787-5:2026
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 787-5
EUROPEAN STANDARD
NORME EUROPÉENNE
April 2026
EUROPÄISCHE NORM
ICS 87.060.10 Supersedes EN ISO 787-5:1995
English Version
General methods of test for pigments and extenders - Part
5: Determination of oil absorption value (ISO 787-5:2026)
Méthodes générales d'essai des pigments et matières Allgemeine Prüfverfahren für Pigmente und Füllstoffe -
de charge - Partie 5: Détermination de l'indice d'huile Teil 5: Bestimmung der Ölzahl (ISO 787-5:2026)
(ISO 787-5:2026)
This European Standard was approved by CEN on 4 January 2026.
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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye 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
© 2026 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 787-5:2026 E
worldwide for CEN national Members.
Contents Page
European foreword . 3
European foreword
This document (EN ISO 787-5:2026) 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 October 2026, and conflicting national standards shall
be withdrawn at the latest by October 2026.
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 787-5:1995.
Any feedback and questions on this document should be directed to the users’ national standards
body/national committee. A complete listing of these bodies can be found on the CEN website.
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, France, Germany, Greece, Hungary, Iceland,
Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of
North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and the
United Kingdom.
Endorsement notice
The text of ISO 787-5:2026 has been approved by CEN as EN ISO 787-5:2026 without any modification.
International
Standard
ISO 787-5
Second edition
General methods of test for
2026-04
pigments and extenders —
Part 5:
Determination of oil absorption
value
Méthodes générales d'essai des pigments et matières de charge —
Partie 5: Détermination de la prise d'huile
Reference number
ISO 787-5:2026(en) © ISO 2026
ISO 787-5:2026(en)
© ISO 2026
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
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Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii
ISO 787-5:2026(en)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Reagent . 1
5 Apparatus . 1
6 Sampling . 2
7 Procedure . 2
7.1 General .2
7.2 Conditioning.2
7.3 Test portion .2
7.4 Determination .2
7.4.1 Burette method .2
7.4.2 Dropping bottle method .3
8 Expression of results . 3
8.1 Burette method .3
8.2 Dropping bottle method .4
9 Test report . 4
Bibliography . 5
iii
ISO 787-5:2026(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,
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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
...
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