Alcance
This document specifies a method for the determination of the particle size distribution of coating powders by sieve analysis. Particle size distributions with a maximum of less than 100 �m is determined by laser diffraction, ISO 8130‑13. This method is used especially for determining the oversize material or for the presence of contamination and can be used as a quality control procedure ("go"/"no go" test) by checking the amount 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 �m to 63 �m;— electrostatic coating: 10 �m to 200 �m;— fluidizing-bed method: 100 �m and above.NOTE Sieves with a mesh size smaller than 32 �m are not practical and are likely to become blind during use.