Hygroscopicity refers to a material’s ability to absorb water from its environment. A hygroscopic material is a material with a tendency to absorb water from its surroundings. While particle size analysis of such materials is still important, and required, according to most safety and manufacturing standards, analysis of a hygroscopic material may prove difficult due to the material’s tendency to absorb water and swell, thus increasing particle size. However, Hosokawa Micron Powder System’s Mikro Air Jet Sieve -- MAJSx is capable of analyzing hygroscopic material. This video explains how.
Note: Hygroscopic material should have its hygroscopicity tested before being tested in the MAJSx.