Ribbed Smoked Sheet Rubber is commonly known as RSS. It is made directly from latex which is treated and then made to coagulate. The coagulated latex sheets are then air dried or smoked in ovens.The smoked sheets are visually graded on the basis of certain parameters and then packed in bales. Ribbed smoke sheets(RSS)taken out of smoke house are visually examined by holding against clear light & graded as RSS1X, RSS-1, RSS-2, RSS-3, RSS-4 & RSS-5 depending on the colour, translucency, bubbles, blisters, dirt, sand and other foreign matter.