For reducing the quantity of metal ions in the dyeing of natural dye

在对天然染料进行染色时，应减少媒染剂中金属离子的用量。(1)阐明了胭脂虫、皂荚木等金属离子染色的用量要求，确定了染色牢度。(2)采用水溶液吸收光谱法考察了金属离子与色素络合生成量的关系。(3)揭示了金属离子对纤维颜色和物理强度的二次影响。

In the dyeing of natural dye, we should decrease the quantity of the metal ions in mordanting.(1) Demands of the quantity (%o.w.f.) of the metal ions which dyeing with cochineal and sapanwood et al. were elucidated and the fastness were confirmed.(2) The relation of the quantity to generate the pigment complexed with the metal ions was examined by using the absorption specta in aqueous solution.(3) The secondary effect of the metal ions in the color and the physical strength of fiber were revealed.