This standard specifies the Shore hardness test method for electric carbon products. This standard is applicable to the Shore hardness test of electric brushes and other carbon graphite products.
JB/T 8133.4-1999 history
2013JB/T 8133.4-2013 Test method for physical-chemical properties of electrical carbon product.Part 4:Shore hardness
1999JB/T 8133.4-1999 Test method for physical-chemical properties of electrical carbon product.Shore hardness