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ASTM International , 10/01/2019
Publisher: ASTM
File Format: PDF
$22.00$44.00
1.1This 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.
1.2Laminar, plate-like pigments and composite pigments having a definite bimodal distribution are not considered within the scope of this practice.
1.3Parameters-The fineness characteristics are reported in the following three parameters:
1.3.1Particle Size Parameter.
1.3.2Coarseness 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.
1.3.3Dispersion Parameter-A parameter descriptive of the uniformity of the particle size distribution.
1.4This 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.
1.5This 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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