Ribbed Smoked Sheet: RSS / Compressed SmokedRubber Sheet, is a primary natural rubber product,that has been processed into sheets through heatand relying on smoke combustion to coat the surfaceof the rubber, which are done at the same time.Afterwards, the rubber is graded according to widelyused requirements, for example, contamination, airbubbles, color and color consistency, and othercontiminants including mold. In all, there are threequality grade rubber sheets that are popularly usedin the downstream market, which are: rubber sheetsclass 2, 3 and 4, from the highest to lowest qualitygrade respectively.