introduction
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ISO 787-9-2019 “General test methods for pigments and fillers – Part 9: Determination of the pH of water suspensions”

Any trade names used in this document are provided for the convenience of the user and do not constitute an endorsement.

Voluntary, related standards and conformity assessment related ISO specific and express the meaning of terminology as well as in relevant ISO technical barriers to trade (TBT) adhere to the principle of the world trade organization (WTO) information, please refer to the following URL:iso.org/iso/foreword.html.

This document was prepared by the ISO/TC 256 Technical Committee on Pigments, Dyes and Fillers.

The second edition cancels and replaces the technically revised first edition (ISO 787-9:1981). The main changes from the previous edition are as follows:

– In Article 3, a reference to ISO 18451-1 has been added;

– The preparation method of the glass container (5.1) has been changed;

– The repeated determination has been changed to a single determination;

– In addition to ethanol, methanol is added as an alternative wetting agent in Article 7;

– The text has been edited and revised, and the normative references have been updated.

ISO 787-9-2019 “General test methods for pigments and fillers – Part 9: Determination of the pH of water suspensions”

A list of all components in the ISO 787 family can be found on the ISO website.

Any feedback or questions regarding this document should be directed to the user’s national standards body. A complete list of these institutions can be found at iso.org/members.html.

1 Range
This document specifies a general test method for determining the pH of a water suspension of a pigment or filler sample.

2 Normative references

The following files are referenced in text in a manner that constitutes part or all of the requirements of this document. For dated references, only the cited version applies. For undated references, a new version of the reference (including any revisions) applies.

ISO 15528, Paints, varnishes and raw materials for paints and varnishes – Sampling

ISO 18451-1, pigments, dyes and fillers – terminology – Part 1: General terminology

ISO 787-9-2019 “General test methods for pigments and fillers – Part 9: Determination of the pH of water suspensions”

3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 18451-1 apply.

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