YAMAGUCHI MICA CO.,LTD. - our technology -Manufacturing process of mica powder is classified in two types; one is wet-grinding using water, another is dry-grinding without water. . Our original grinding machine developed as the result of trial and error succeeded in production of mica powder which is extremely thin and has high aspect ratio and smooth surface.wet mica grinding germany,Mica Powder - Mica Powder Exporter, Manufacturer & Supplier .Mica Powder in different form that we provide is obtained by grinding or crushing mica scrap. This kind of powder is produced by two kinds of processes, dry grinding and wet grinding. We can provide Mica Powder upto 325 mesh which is obtained from the process of dry grinding.