| The natural colored cotton is a kind of pure natural fabrics without dyeing, which color is produced naturally in growing. So it won't be received harmful function of chemical reagent while processing, and will keep characteristic of the green products. The natural colored cotton fibers touch softly, and have good function of ventilation and picking up moisture, The natural colored cotton have soft and natural color, being ideal summer wearing fabric, is suited to producing fabrics of underwear next to the skin, and clothing of Children and old people. The natural colored cotton is a new-type fiber rising in near decades, favored by the vast textile industry, and have strong market competitiveness and wide market prospects. Therefore characteristic research and development of special function of the natural colored cotton have important actual meaning and social use value.The subject of the article aims at studying development and application of natural colored cotton on the special functional fabric. The characteristics of natural colored cotton make it become the ideal fabric in summer. However considering the injury to the human body caused by strong sunshine and ultraviolet radiation in summer, it is necessary to proceed resisting-ultraviolet treatment to the natural colored cotton, thus, make the colored cotton fabric have resisting-ultraviolet functions, reduce various kinds of danger to human skin. Besides, based on ultraviolet absorption rates, the ability of resisting-ultraviolet of colored cotton is very low, under numerous fibers. Therefore it is more important to precede resisting-ultraviolet treatment to the colored cotton further.In order to precede resisting-ultraviolet treatment, at first analyzing some characteristics of colored cotton, including its physics performance and chemical property. Besides, learning about situations of resisting-ultraviolet ways at present, used material of resisting-ultraviolet and ways of treatment. Combining a large of experiments, many factors influenced of the resisting-ultraviolet ability of natural colored cotton was analyzed, and three main influences were found at last. According to the corresponding experiments of these three factors, three conditions and basic treatment technology were found which would improve the resisting-ultraviolet ability of colored cotton relatively.Imagine to this preliminary technology, hoping to improve colored cotton to resist ultraviolet further, then adopt handing in experimental design and data analysis to try to achieve a piece of optimum process conditions, and go on verification experiment to prove the accuracy of experiment. At last, every sample treated in handing in experiment was tested every physics performance, and was analyzed the change of their performance around dealing with. On the base of wearable request ofknitting fabric, evaluating every physics performance..In end of the article, the method of testing of the resisting-ultraviolet index of colored cotton was researched emphatically. Several kinds of daily methods of testing resisting-ultraviolet index at present were analyzed, including testing principle and their pros and cons. Consider that the price of test of some methods is too high, and then attempt to look for a kind of relatively cheap and feasible method of testing in the subject.Inspired by the photo nasty and meeting of some materials, A simple and easy method was found. According to this principle, carry on experiment again and again, and perfect the course of test entirely, in order to make the method more simple, convenient and more accurate. At last another function of quantitative test was added to the simple and easily method according principle of color difference, through analyzing of return to equation, a linear between value of color difference and the rate of ultraviolet has been set up. Also, make verification experiment to prove exactness of the linear equation again.Thought a series of experiments and analyses, at last a summing-up expression to this subject wa...
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