Grain size detection

Grain size & mdash; is used to describe the parameters of grain size, commonly used expression methods: the number of grains per unit volume (zv); or the number of grains per unit area (ZS) or the average line length (or diameter) of grains.            The grain size can be expressed by the average area or diameter of the grain. Grain size grade is used to express grain size in industrial production. The standard grain size is divided into 8 grades, 1-4 is coarse grain, 5-8 is fine grain Generally, the larger the grain size is, the finer the better.