Dehusking or dehulling is the process of removing the husks from the rice grains after retrieval. It is done by using friction as the paddy grains pass between two abrasive surfaces that move at different speeds. After dehusking, the husk is removed by suction and transported to a storage dump outside the mill.
Polishing of the rice is done by rubbing the rice kernels against each other which removes the dust, changesthe texture (removes insoluble fiber),betters digestibility, eases chewing and decreases protein content in this form.
Rice grading is a process of sorting and assigning rice into its classes or grade based on size difference i.e full & half or broken. It plays an important role in the determination of rice quality and its subsequent price in the market.