Home / Standards / GB/T 7048-2012 GB/T 7048-2012 Active Colour carbon black - Determination of blackness 色素炭黑 黑度的测定 Standard Type GBT ICS 83.040.30 CCS G49 Status 现行 Issue Date 2012-06-29 Implementation 2012-12-01 Responsible Dept 中国石油和化学工业联合会 Drafting Unit N/A