Extraction, optimisation and dyeing of silk yarn using natural dye from cosmos sp
The use of natural dye decreased in last few decades due to the discovery of synthetic dye in nineteenth century. Recently, non toxic, environment friendly natural dye started receiving much attention in order to avoid hazardous petrochemical raw materials which involve in synthetic dye production and also its non biodegradable effluent. In this study, extraction of a natural dye from Cosmos sp flower was optimised. Pretreated silk yarn was dyed with aqueous extract of the dye.