This part of JB/T 8262 specifies the particle size distribution, measurement principle, instruments and measuring tools, and measurement process of electrostatic copying dry toner. This section applies to particle size measurements performed on a particle size analyzer using the resistance method (Coulter method), and the small hole is a single small hole tube.
JB/T 8262.4-2013 history
2013JB/T 8262.4-2013 Electrostatic dry toner.Part 4: Test method for particle size distribution