General methods of test for pigments and extenders - Part 9: Determination of pH value of an aqueous suspension

This document specifies a general method of test for determining the pH value of an aqueous suspension of a sample of pigment or extender.

Méthodes générales d'essai des pigments et matières de charge — Partie 9: Détermination du pH d'une suspension aqueuse

Le présent document spécifie une méthode générale d'essai pour la détermination du pH d'une suspension aqueuse d'un échantillon de pigment ou de matière de charge.

General Information

Status
Published
Publication Date
25-Feb-2019
Current Stage
9092 - International Standard to be revised
Start Date
23-Oct-2024
Completion Date
13-Dec-2025

Relations

Effective Date
21-Oct-2017

Overview

ISO 787-9:2019 outlines a standardized method for determining the pH value of aqueous suspensions of pigments and extenders. This international standard is essential for quality control and product specification in industries dealing with pigments, dyes, and extenders. The document provides clear guidelines on sampling, preparation, and measurement techniques, ensuring consistent and reliable pH testing results across laboratories worldwide.

Maintained by ISO/TC 256, this second edition updates the 1981 version by incorporating modern practices such as the use of methanol as an alternative wetting agent and refining the method for preparing samples and equipment.

Key Topics

  • Scope and Purpose
    Establishes a general method to measure the pH of pigment or extender suspensions, crucial for understanding product behavior and compatibility in formulations.

  • Sampling Procedures
    Samples must be representative and collected per ISO 15528 to provide accurate and reliable pH measurements reflective of the bulk product.

  • Sample Preparation
    Suspensions are prepared at 5% to 10% mass fraction in distilled or demineralized water or an optional buffer solution, maintaining consistency in testing conditions.

  • Apparatus Requirements
    Use chemically resistant glass containers fitted with appropriate stoppers and a calibrated pH measuring device with at least 0.1 pH unit sensitivity.

  • Measurement Protocol
    The pH of the suspension is recorded after vigorous mixing and a rest period, with temperature control ensuring accuracy. Wetting agents like ethanol or methanol may be added to aid dispersion when necessary.

  • Reporting Guidelines
    The final test report must detail the product identification, testing method reference, wetting agents used, results, testing temperature, and any procedural deviations.

Applications

ISO 787-9:2019 is widely applicable across multiple industries, including:

  • Paints and Coatings
    Ensuring pigment compatibility and stability by monitoring pH in pigment suspensions helps optimize paint formulations.

  • Plastics and Polymers
    The pH of extender suspensions affects processing and product performance, making this test vital during raw material quality control.

  • Inks and Printing
    Controlling pigment suspension pH impacts ink stability, drying times, and final print quality.

  • Textiles and Dyes
    Accurate pH evaluation of pigment or dye suspensions ensures consistent color application and fabric treatment.

  • Laboratories and Quality Control
    Standardized pH testing per ISO 787-9 supports regulatory compliance, laboratory accreditation, and cross-industry product standardization.

Related Standards

  • ISO 15528 - Sampling of Paints, Varnishes and Raw Materials
    Defines proper sampling techniques to obtain representative pigment and extender samples for testing.

  • ISO 18451-1 - Terminology of Pigments, Dyestuffs and Extenders
    Provides standardized definitions and terms used throughout ISO 787-9, facilitating clear communication.

  • ISO 787 Series - General Methods of Test for Pigments and Extenders
    Includes several parts covering diverse test methods to assess physical and chemical properties essential for pigment analysis.

  • ISO/IEC Directives, Part 1 & 2
    Outlines document development procedures and editorial rules followed in the preparation and maintenance of ISO standards.


Implementing ISO 787-9:2019 effectively supports consistent quality control and enhances product reliability across industries reliant on pigments and extenders. By standardizing the measurement of pH in aqueous suspensions, businesses can achieve improved process control, product development, and compliance with international requirements.

Standard

ISO 787-9:2019 - General methods of test for pigments and extenders — Part 9: Determination of pH value of an aqueous suspension Released:26. 02. 2019

English language
2 pages
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Standard

ISO 787-9:2019 - Méthodes générales d'essai des pigments et matières de charge — Partie 9: Détermination du pH d'une suspension aqueuse Released:26. 02. 2019

French language
2 pages
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Frequently Asked Questions

ISO 787-9:2019 is a standard published by the International Organization for Standardization (ISO). Its full title is "General methods of test for pigments and extenders - Part 9: Determination of pH value of an aqueous suspension". This standard covers: This document specifies a general method of test for determining the pH value of an aqueous suspension of a sample of pigment or extender.

This document specifies a general method of test for determining the pH value of an aqueous suspension of a sample of pigment or extender.

ISO 787-9:2019 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 787-9:2019 has the following relationships with other standards: It is inter standard links to ISO 787-9:1981. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.

You can purchase ISO 787-9:2019 directly from iTeh Standards. The document is available in PDF format and is delivered instantly after payment. Add the standard to your cart and complete the secure checkout process. iTeh Standards is an authorized distributor of ISO standards.

Standards Content (Sample)


INTERNATIONAL ISO
STANDARD 787-9
Second edition
2019-03
General methods of test for pigments
and extenders —
Part 9:
Determination of pH value of an
aqueous suspension
Méthodes générales d'essai des pigments et matières de charge —
Partie 9: Détermination du pH d'une suspension aqueuse
Reference number
©
ISO 2019
© 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

Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Reagents . 1
5 Apparatus . 1
6 Sampling . 2
7 Procedure. 2
8 Expression of results . 2
9 Test report . 2
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 on the voluntary nature of standards, the meaning of ISO specific te
...


NORME ISO
INTERNATIONALE 787-9
Deuxième édition
2019-03
Méthodes générales d'essai des
pigments et matières de charge —
Partie 9:
Détermination du pH d'une
suspension aqueuse
General methods of test for pigments and extenders —
Part 9: Determination of pH value of an aqueous suspension
Numéro de référence
©
ISO 2019
DOCUMENT PROTÉGÉ PAR COPYRIGHT
© ISO 2019
Tous droits réservés. Sauf prescription différente ou nécessité dans le contexte de sa mise en œuvre, aucune partie de cette
publication ne peut être reproduite ni utilisée sous quelque forme que ce soit et par aucun procédé, électronique ou mécanique,
y compris la photocopie, ou la diffusion sur l’internet ou sur un intranet, sans autorisation écrite préalable. Une autorisation peut
être demandée à l’ISO à l’adresse ci-après ou au comité membre de l’ISO dans le pays du demandeur.
ISO copyright office
Case postale 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Genève
Tél.: +41 22 749 01 11
Fax: +41 22 749 09 47
E-mail: copyright@iso.org
Web: www.iso.org
Publié en Suisse
ii © ISO 2019 – Tous droits réservés

Sommaire Page
Avant-propos .iv
1 Domaine d'application . 1
2 Références normatives . 1
3 Termes et définitions . 1
4 Réactifs . 1
5 Appareillage . 2
6 Échantillonnage . 2
7 Mode opératoire. 2
8 Expression des résultats. 2
9 Rapport d'essai . 2
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'attention est appelée sur le fait que certains des éléments du présent document peuvent faire l'objet de
droits de propriété intellectuelle ou de droits analogues. L'ISO ne saurait être tenue pour responsable
de ne pas avoir identifié de tels droits de propriété et averti de leur existence. Les détails concernant
les références aux droits de propriété intellectuelle ou autres droits analogues identifiés lors de
l'élaboration du document sont indiqués dans l'Introduction et/ou dans la liste des déclarations de
brevets reçues par l’ISO (voir www .iso .org/brevets).
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 le
...

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