本實驗採用柑橘皮作為材料，萃取其色素，並且探討染色之可行性，在不同濃度及pH條件下，觀察主吸收波長與吸光度值，對柑橘皮天然色素做再現性分析，並以硫酸亞鐵、氯化錫、硫酸銅，三種媒染劑對聚酯織物染色，比較其表觀濃度、上色率，及染色堅牢度。實驗結果顯示，柑橘皮色素萃取液再現性之變異係數為31%，染色使用硫酸亞鐵作為媒染劑有最高的表觀濃度，染色堅牢度方面，則以氯化錫為最佳，可達到4級至4-5級。
In this experiment, citrus peel was used as a material, extracted to obtain the colorant of its own. The dyeability of citrus on textiles in various concentrations and pH conditions, determination of its λ_(max) wavelength and the reproducibility of the natural colorant (citrus peel) by the absorption value at the λ_(max) are all discussed in this article. In addition, three kinds of mordant ferrous sulfate, stannic chloride, copper sulfate are also used in dyeing polyester fabrics with the natural colorant obtained from this experiment, and the apparent concentration, dye-uptake, and dyeing fastness of the specimens are also examined. The results show that the reproducibility of the natural colorant extracted from citrus peel is about 31% in the unit of coefficient of variation. And the ferrous sulfate mordant can have the highest dye-uptake concentration among all the mordants tested while the stannic chloride the best dyeing fastness, about reaching to 4 or 4-5 grade.
