... Function:Shaw rubber hardness gauge is an apparatus to measure vulcanized rubber and plastic products.This apparatus has ... hg/t2489-93, JJG304-2003.Attention: Type A: applicable to general rubber, synthetic rubber, vulcanized rubber, soft rubber, leather ... hardness test of rubber microporous material.Type D: applicable to hard rubber, hard resin, acrylic, glass, cushiony plastic cement, printing plates ...