A Study of Lac-dyeing with Tin Mordant

Abstract

Lac-dye is generally believed to be a natural dye to develop brilliant red chromaticity which is difficult to get with other natural dyestuffs, when it is mordanted with a compound of tin. We have studied to determine what kind of tin compound should be used and what method be applied to, in order to develop of brilliant red color. As the result, we confirmed that the method to use tin dichloride before dyeing, is effective for development of brilliant red color and color fastness to light and drycreaning.
Also through the amounts of fixing lac-dye and tin dichloride, we have ascertained that the amounts of them should be nearly the same. Though there are many natural dyes of repeating in dyeing, we confirmed that in this case, K/S value was unchanged for more than four trials.