The cotton gray fabric has a colour of yellowish-white. After bleaching there occur var-ious coloured defects (usual blue and red) on it.
棉织物坯布呈米黄色，漂白后布面上呈现各种有色疵点，其中以红色和蓝色为主。
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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