introduction
ISO (International Organization for Standardization) is a global federation of national standards associations (ISO member bodies). The development of international standards is carried out through ISO technical committees. Each member institution interested in a subject on which a technical committee has been established has the right to be represented on that committee. International governmental and non-governmental organizations liaising with ISO are also involved in this work.

Draft international standards adopted by technical committees are circulated to member bodies for approval before being accepted as international standards by the ISO Council.

The international standard ISO 787/1 was developed by the Technical committee ISO/TC 35 (Paints and varnishes) and distributed to member institutions in June 1980.

ISO 787-1-1982 General test methods for pigments and fillers – Part 1: Comparison of pigment colors

It has been approved by the following national member bodies:

The member bodies of the following countries expressed their disapproval of the document on technical grounds:

ISO 787-1-1982 General test methods for pigments and fillers – Part 1: Comparison of pigment colorsFrance

Germany, F.R.

This international standard eliminates and replaces ISO Recommendation R 787/1-1968, which constitutes a technical revision.

The purpose of this standard is to establish a common set of test methods for pigments and fillers that are applicable to all or many individual pigments and fillers for which specifications may be required. In this case, a cross-reference to the general method should be included in the international standard relating to the pigment or filler, with an indication of any detailed modifications that may be required in view of the particular properties of the product concerned.

The ISO/TC 35 Technical Committee, Paints and Varnishes, decided that all common methods should be published as part of a single international standard when available to emphasize the relationship of each method to the entire series.

ISO 787-1-1982 General test methods for pigments and fillers – Part 1: Comparison of pigment colors

The Technical Committee also decided that if two or more procedures are widely used to determine the same or similar properties of pigments or fillers, there is no objection to the inclusion of more than one of these procedures in the ISO series. In this case, however, you need to clearly state which method will be used in the specification and which method is used in the test report.

Published portions of the series are as follows:

Part 1: Comparison of pigment colors

Part 2: Determination of volatile substances at 105°C

Part 3: Determination of water-soluble substances – hot extraction method

Part 4: Determination of acidity or alkalinity of water extracts

Part 5: Determination of oil absorption value

Part 7: Determination of residue on screens – Water method – Manual procedure

Part 8: Determination of water-soluble substances – Cold extraction method

ISO 787-1-1982 General test methods for pigments and fillers – Part 1: Comparison of pigment colors

Part 9: Determination of the pH of water suspensions

Part 10: Determination of density – Specific gravity bottle method

Part 11: Determination of compaction volume and apparent density after compaction

Part 13: Determination of water-soluble sulfates, chlorides and nitrates

Part 14: Determination of the resistivity of water extracts

Part 15: Comparison of light fastness of similar types of colored pigments

Part 16: Relative coloring force (or equivalent coloring value) and

Use automatic Muller to restore the color of linseed forest oil

Part 17: Comparison of flash power of white pigments

ISO 787-1-1982 General test methods for pigments and fillers – Part 1: Comparison of pigment colors

Part 18: Determination of residue on screens – water method – mechanical flushing procedure

Part 19: Determination of water-soluble nitrates – salicylic acid method

Part 20: Comparison of dispersability – Oscillation oscillation method

Part 21: Comparing the thermal stability of pigments using baking media

Chapter 22 Comparison of the resistance of pigments to osmosis

Part 23: Determination of density (removal of ensnared air by centrifuge)

Part 24: Determination of the relative coloring power of colour pigments and the relative scattering power of white pigments – photometric method

0 Introduction
This document is part of ISO 787 “Common Test Methods for pigments and fillers”. ISO/R 787/1 was published in July 1968. The difference between this revision and the 1968 edition is this

a) The color comparison is performed using the procedure described in ISO 3668, and

b) No adhesive is specified.

1 Scope and field of application
1.1 This part of ISO 787 specifies a common test method for comparing the color of colored pigments with the color of agreed samples.

1.2 Any of the procedures described in Article 6 are acceptable, but the method using the automatic Muller is the reference method.

ISO 787-1-1982 General test methods for pigments and fillers – Part 1: Comparison of pigment colors

Note that when this general approach is applied to a given pigment, the international standard relating to that pigment should include only a cross-reference to that pigment and indicate any detailed modifications that may be required in view of the particular properties of the material concerned. A special method of color comparison should be specified only if the procedure given in this general method is not applicable to a particular material.

2 Reference Materials
ISO 150, raw, refined and boiled flaxseed oil for paints and varnishes – Specification and test methods.

ISO 842, Paints and varnishes raw materials – Sampling.

ISO 3668, Paints and varnishes – Visual comparison of paint colors.

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