This document specifies a method for the determination of the equivalent-sphere particle size distribution of coating powders by laser diffraction, for particles of the size range from 1 µm to 300 µm. NOTE There is a possibility that particle sizes >300 µm need the use of a different optical model. This document is specific for the measurement of coating powders and also draws attention to ISO 13320, which provides guidance on instrument qualification and particle size distribution. Laser diffraction is not suitable for determining oversize material, which can be verified by sieve analysis as described in ISO 8130-1 or by dynamic image analysis as described in ISO 13322-2.
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ISO 13320:2009 Particle size analysis -- Laser diffraction methods
ISO 15528:2013 Paints, varnishes and raw materials for paints and varnishes -- Sampling
ISO 291:2008 Plastics -- Standard atmospheres for conditioning and testing
ISO 13320:2009 Particle size analysis -- Laser diffraction methods
ISO 15528:2013 Paints, varnishes and raw materials for paints and varnishes -- Sampling
ISO 291:2008 Plastics -- Standard atmospheres for conditioning and testing
ISO 8130-14:2019 Coating powders -- Part 14: Vocabulary
ISO 9276-1:1998 Representation of results of particle size analysis -- Part 1: Graphical representation
ISO 9276-2:2014 Representation of results of particle size analysis -- Part 2: Calculation of average particle sizes/diameters and moments from particle size distributions
ISO 9276-4:2001 Representation of results of particle size analysis -- Part 4: Characterization of a classification process