· Ultrafine grinding: 10μm ⇒1μm or less Impact, shear, and friction Friction, impact, and compression Wet medium agitation type grinder (bead mill, attritor, etc.) Planetary mill (depending on conditions) * There are various classifiions of pulverization operation. Pulverization may be classified into rough, medium, small crushing, coarse, fine, and ultrafine grinding. Thinky pulverizer ...