Effects of Residual Non-cellulosic Content of Flax on Dyeing with Direct Dye

摘要

Flax fabric was pretreated conventionally in such a way that different levels of residual noncellulosic content could be obtained on the material. These fabric samples were dyed with three structurally different direct dyes to study the effects of noncellulosic content on dyeing behaviour. The dyeing characteristics were analysed by various techniques, namely colour strength, fastness properties and evenness. Colour exhaustion, strength and fastness properties of dyed fabrics and the levelness of dyeing were found to be improved with the removal of noncellulosic impurities from the grey material, up to a certain level, beyond which they did not change significantly.