JIS Z 8820-1:2002 Determination of particle size distribution by gravitational liquid sedimentation methods -- Part 1: General principles and guidelines
This standard specifies methods for measuring the particle size distribution of particulate matter that settles due to gravity in a liquid phase, often in the range of 0.5 um to 100 um, based on Stokes' law.
JIS Z 8820-1:2002 history
2002JIS Z 8820-1:2002 Determination of particle size distribution by gravitational liquid sedimentation methods -- Part 1: General principles and guidelines
1990JIS Z 8820:1990 General rules for the determination of particle size distribution by sedimentation in liquid