This standard specifies the requirements, sampling, test methods, inspection rules, signs, labels, packaging, transportation and storage of sulfur black 3B, 4B, 3BR, 2RB (CI sulfur black 1). This standard applies to the quality inspection of sulfur black 3B, 4B, 3BR and 2RB products, which are mainly used for dyeing cotton textiles.
GB/T 1655-2006 history
2013GB/T 1655-2013 Sulphur Black 3B、4B、3BR、2RB (Sulphur Black BN、BRN、B2RN、RN)
2006GB/T 1655-2006 Sulphur black 3B, 4B, 3BR, 2RB (Sulphur black BN, BRN, B2RN, RN)
1997GB/T 1655-1997 Sulphur black 3B,4B,3BR,2RB(Sulphur black BN,BRN,B2RN,RN)