primary processing of rice

• once the rice is harvested it must be threshed to separate the grain from the stalk and then cleaned (these can be done by hand or machine)
• after threshing, the rice is screened to remove stones, loose chaff and paddy stalks, the rice is then slowly dried by warm air to reduce moisture and screened again to remove dust
• the outer husk is then removed, and if the bran is intact this forms brown rice, the rice is then graded. if it is to be sold as white rice, it then it undergoes milling, an abrasive action that removes the bran layer