本文利用天然植物洋蔥外皮、茜草所革取出的染液對棉纖維進行染色，改變植物萃取液的pH值和染色時間，嘗試尋求天然染料對棉纖維染色之最適化條件，並利用不同之金屬離子進行媒染處理，籍以探討金屬絡合作用對棉纖維染色性質的影響以及色相的變化。由實驗結果得知，無論以洋蔥或茜草萃取的染液，染著棉纖維其色彩大都偏向褐色系，且其明度值皆會變暗，惟洋蔥萃取染液，以硫酸亞鐵和氯化鐵處理時，其色彩偏向橄欖綠色，又5種金屬化合物中，以氯化亞錫處理的色彩變化最大。此外，植物色素染色可經金屬絡合處理，來提升固色效果及染色堅牢度。
The dye liquor extracted from onion's external hide and chay to dye cotton were used in this paper, we changed the pH value of dye liquor and dyeing time trying to find out the most suitable conditions of plant dyes on cotton. Moreover, we treated the dyed cotton with various metal ions and mordant consistency in the mordant procedure to probe into the effects of mordant relations on the dyeing properties and the variation of the shade of the cotton. Through the results of this experiment, we found that it could advance the effectiveness of coloration showed some are brown and some are olive. Besides, the dyeing fastness is improvement, too.
