From a study of dyeing cotton yarn with water dye from the bark of rubber trees na. The condition of cotton yarn with Ca (OH) 2 and that contain different concentrations. Different types of modaen substances and different concentrations by using both dye-modaen dyeing substance is 3, then water dye dye from the bark, Po. The dye substance modaen with dye from the bark, Bodhi and watercolor dye dye from the bark, then modaen dye Po results display: table.
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