Abstract: In order to identify cotton and ramie and determine blending ratio of cellulose fibers based on stain and image process method, a new method for staining cellulose fibers and its preprocess condition is researched. It is found that swelling process before staining sample and testing under low temperature environment is necessary to maximize the color difference between cotton and ramie. Color forming mechanism and its influence factors are also researched. It is found that color stability in cotton is better than in ramie because of cellulose-iodine compound formed in cotton and color difference between cotton and ramie is narrowed with time elapsing under atmospheric temperature. It is also found that color stability for cotton and ramie is good and color difference among regenerated fibers, cotton and ramie is maximized under low temperature. In addition, focusing play an important role in determine stained color of fiber. The result will play a important role in determining blending ratio of cotton/ramie textile automatically.

Key words: Determining blending ratio of cotton and ramie, Stain method, Compound, Testing under low temperature