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Pigments

Pigment particle testing standards are published by ISO and ASTM. The ASTM documents cover standard specifications, test methods, and practices on calcium carbonate, zinc phosphate, coarse particles, evaluating relative tint undertone of titanium dioxide pigments, and reporting particle size of pigments. The ISO documents cover methods for assessing the degree of pigment in polyolefin and tests for pigment residue on sieves.

ASTM D1199-86(2020)

Standard Specification for Calcium Carbonate Pigments

1.1 This specification covers two types of high-content calcium carbonate pigments, as follows: 1.1.1 Type PC Calcium carbonate precipitate, prepared either by complete solution or by carbonation of lime. 1.1.2 Type GC Ground mineral product. 1.2 Six grades of pigments, based on particle size (see 3.3 ) are covered. 1.3 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only. 1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

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ASTM D6280-98(2020)

Standard Specification for Zinc Phosphate Pigments

1.1 This specification covers three types of pigments commercially known as zinc phosphate each of which may or may not be available in specific grades delineated by particle size or oil absorption. 1.1.1 Type I Zinc Phosphate, dihydrate predominant. 1.1.2 Type II Zinc Phosphate, dihydrate tetrahydrate mixture. 1.1.3 Type III Zinc Phosphate, tetrahydrate predominant. 1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.3 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

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ASTM D185-07(2019)

Standard Test Methods for Coarse Particles in Pigments

1.1 These test methods cover the determination of the amount of coarse particles in dry pigments. 1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only. 1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

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ASTM D6131-17

Standard Test Method for Evaluating the Relative Tint Undertone of Titanium Dioxide Pigments

1.1 This test method is intended to be used to determine the tint undertone (blue or yellow) of titanium dioxide pigments. This relates to the effective particle size of the pigment 1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

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ASTM D1366-86(2019)

Standard Practice for Reporting Particle Size Characteristics of Pigments

1.1 This practice for reporting the fineness characteristics of pigments is designed to apply in most cases where well-known methods for determining these particle size characteristics in the subsieve range are employed, such as microscopic, sedimentation, and turbidimetric methods; and partially to absorption and permeability methods. 1.2 Laminar, plate-like pigments and composite pigments having a definite bimodal distribution are not considered within the scope of this practice. 1.3 Parameters The fineness characteristics are reported in the following three parameters: 1.3.1 Particle Size Parameter. 1.3.2 Coarseness Parameter A parameter descriptive of the coarseness character of the pigment, making use of a limiting value in the subsieve range similar to that used in the sieve ranges. 1.3.3 Dispersion Parameter A parameter descriptive of the uniformity of the particle size distribution. 1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

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ISO 18553:2002

Method for the assessment of the degree of pigment or carbon black dispersion in polyolefin pipes, fittings and compounds

This International Standard describes a method with two procedures for the assessment of pigment or carbon black particle and agglomerate size and degree of dispersion in polyolefin pipes, fittings and compounds. The method is applicable to polyolefin pipes and fittings, as well as raw material in pellet form, with the choice of procedure to be determined by the referring specification. The method is applicable to carbon black pigmented polyolefin pipes, fittings and compounds with a carbon black content of less than 3 %.

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ISO 787-18:1983

General methods of test for pigments and extenders - Part 18 : Determination of residue on sieve - Mechanical flushing procedure

The method specified can also be applied to the examination of other powders or granules which are insoluble in water. It is neither applicable to hydrophobic nor pelletized materials. In the test apparatus the material under test, dispersed in water, is brought into centrifugal motion by a system of rotating jets of water. he water flushes the fine particles through the sieve, the coarse particles being retained on the sieve. The residue on the sieve is dried and weighed. - Cancels and replaces ISO 787/18-1973 and constitutes its technical revision.

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