Natural Dyeing Of Wool Using Bio -fixing Agents

摘要

The method of dyeing woollen yarn with Annato, Catechu and French Marigold was standardized by determining the optimum dyeing conditions, namely dye material concentration, dye material extraction time, dyeing time, mordant concentration and mordanting method. The washing, rubbing, light and perspiration fastness of the dyed samples was also evaluated, giving fair to excellent fastness grades. Environmental awareness throughout the world now seems to rescue the total 'fall' of vegetable dyes. Hazards of the chemical industry in general and dyes in particular have forced environmentalists to think in terms of natural products. Trends of greater use of synthetic substitute of natural substances has been reversed. Of course, economics and availability factors are serious impediments in this switch over but the time is not far off when this hurdle be removed and vegetable dyes retain their lost glory.