Cotton fabric is cationised by the modifier DT and dyed with the natural Lac dye.
采用改性剂DT对棉织物进行阳离子改性处理，然后用天然虫胶染料对其进行染色试验。
People utilized the natural coloured material and dyed silk, cotton, wool fabric, etc. to begin very early.
人们利用天然有色物质染丝、棉、毛织品等很早就开始了。
People utilized the natural coloured material and dyed silk, cotton, wool fabric, etc. to begin very early.
人们利用天然有色物质染丝、棉、毛织品等很早就开始了。
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