Study On Colour Properties Of Naturally Green Cotton

This paper discussed the infection when many surface active agent, complex builder and oxidizing agents treated the naturally green cotton fabrics. The colour measuring and matching system was used to measure the colour difference (△E) of fabric. The distributing of fiber colouring material was observed by optical microscope. Light fastness of fabric was measured. Some appropriate agent and mixing technology were selected in order to choose a technics which could improve light fastness of naturally green cotton fabrics.The results show that the infection of colour change and light fastness was different that on naturally green cotton by different surface active agents. The infection degree of colour change on naturally green cotton by surface active agent was: cation surface active agent >anion surface active agent > nonionic surface active agent. The colour of green cottons was jade-green when the fabrics were treated by oxidizing agents. There was a greater influence on the colour and light fastness of the fabrics which was treated by complex builder. The infection degree of colour on green cotton by different complex builder was: complex builder F> complex builder C > complex builder A. The higher the temperature, the larger the color difference (△E). The light fastness of green cotton fabric was improved when the fabrics were treated by the mixture of complex builder and surface active agent. Complex builder was the effective components in improving the light fastness and the surfactants played a role in the adjustment of light. With the increase in temperature and concentration, the colouring material transferred out from lumen and became scattered. The one of the optimization technology was: complex builder A 0.03 g/L, anion surface active agent E 1 g/L, nonionic surface active agent T-3 5 g/L,time:20min, temperature: 40℃,liquor ratio: 1:50. The other of the optimization technology was: complex builder C 0.25 g/L, anion surface active agent D 15 g/L, nonionic surface active agent T-3 5 g/L,time:20min, temperature: 40℃,liquor ratio: 1:50.When the 100% green cotton was treated according to the two optimization technology, the colour difference(△E) of fabric was smaller and ,the light fastness, rubbing fastness and perspiration fastness and soaping fastness of fabric was enhanced. Light fastness of the green/white cotton (75/25) was more a half or a step than 100% green cotton when they were treated by same optimization technology.