Hign-concerned Chemical: Benzidine-based dyes,3,3'-Dimethylbenzidine-based dyes metabolized to 3,3'-dimethylbenzidine,3,3'-Dimethoxybenzidine-based dyes metabolized to 3,3'-dimethoxybenzidine,LEAD GSM: 90gsm is_customized: Yes Weight: 0.6-1.2kg Color Fastness (Grade): 3-4 Model Number: 90gsm Thread