As the envirement to be more and more important, and the dyeing engineering water is the most of water pollution, natural dyes are more important. And it is the main idear push we to discover natural dyes. Gynura bicolor is a low price plant, this study use Gynura bicolor to dye Nylon, see its feasibility in dye, and its K/S. The other way, coating TiO2 to let its dyeing fastness good. The result shows, almost can become good.
