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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 the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
E20 Practice for Particle Size Analysis of Particulate Substances in the Range of 0.2 to 75 Micrometres by Optical Microscopy
ICS Number Code 19.120 (Particle size analysis. Sieving)
UNSPSC Code 12171600(Pigments)
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ASTM D1366-86(2003), Standard Practice for Reporting Particle Size Characteristics of Pigments, ASTM International, West Conshohocken, PA, 2003, www.astm.orgBack to Top