What is MESH and PSD?
MESH size is the number of openings in one inch of screen (United States mesh size). The number of openings is the mesh size. So a 4-mesh screen means there are four little squares across one linear inch of screen. A 100-mesh screen has 100 openings, and so on. As the number describing the mesh size increases, the size of the particles decreases.PSD stands for Particle Size Distribution and it's a definition of percentage contents of grains of different sizes in a given material. Garnet abrasive grades and other sands will always be defined as a certain range of grain sizes, as it's close to impossible (and cost ineffective) to sieve only grain sizes of a single mesh
How to read below table?
Rows represent different garnet grades and their respective PSD. Taking first row as example:"14/30" is the name of a coarse grade garnet often used for blasting purposes. It should contain around: 1% of garnet grains mesh 14, 16% of grains mesh 18, 41% of grains mesh 20 and 41% of grains mesh 30. The fault tollerance is typically 2-4%.
"Garnet mesh 80" is a commercial name of the most popular grade used in Waterjet cutting, even though it's not a precise name in terms of the mesh range. Best cutting performance is typically delivered by 50/100 range.
