This invention is related to a sieving method of cetyl myristate or cetyl palmitate or combination of cetyl myristate and cetyl palmitate by using screen wherein screen size is 1 mm to 1.4 mm. This invention is also directed to using of lubricants/glidants in formulations of cetyl myristate or cetyl palmitate or combination of cetyl myristate and cetyl palmitate wherein APIs are sieved by screen of 1 mm to 1.4 mm.