This part of ISO 8130 specifies a method for the determination of the particle size of coating powders by sieve analysis. Particle size distributions with a maximum of less than 100 ¼m should be determined by laser diffraction (see ISO 8130-13). This method is used especially for determining the oversize material or for the presence of contamination and may be used as a quality control procedure ( go / no go test) by checking the amount of powder retained on a single sieve. The following particle sizes are typical for coating powders, however the particle size can deviate depending on the application: thin-film technology: 1 ¼m to 63 ¼m electrostatic coating: 10 ¼m to 200 ¼m fluidizing-bed method: 100 ¼m and above NOTE Sieves with a mesh size smaller than 32 ¼m are not practical and are likely to become blind during use.