Dyeing of natural vegetable dyes

2010-02-18  来源:本站原创  分类:Industry  人气:185 

Keywords: natural vegetable dyes dyeing a direct staining: After some pre-treatment products, will use vegetable dyes as dyes, do not add any additives. 2, mordant dyeing: What is mordant? What is the role mordant? Not all of the pigment can be easily stained with the fiber, the fiber and the pigment often requires the help of the media combined with the help of this vehicle as mordant. The role of media in addition to dyeing with "hair color effect" but also a considerable degree of "fixation effect" is extremely important in natural dyeing. Media contaminated by three methods: dye before the mordant dyeing, after dyeing mordant, with bath mordant dyeing before the mordant is fiber dip dye prior to the mordant dyeing, after dyeing mordant is in the dip dye only proceed after the mordant in the dyeing step on a Front and back, and hair color are also different, some material is suitable for pre-mordant dyeing, and some materials for the media after dyeing dye test must be compared according to their own needs before selection. With bath mordant dyes and fiber refers to the bath while staining method. The mordant dyeing → → dyed dye staining method can be called in the mordant, which combines pre-mordant dyeing and after dyeing mordant the results. Mordant chemical composition will not cause environmental pollution? Mordant in addition to natural plant ash, lime, alum stone, rust water, vinegar thing does not produce pollution, but also to use a variety of chemicals containing metal salts, such as acetic acid aluminum acetate, tin acetate, copper acetate, iron and other things more or less of these chemicals have an impact on the environment, but compared to chemical dyes can be very small. Including aluminum, tin, copper, and other metal salts because of little amount, and acetic acid is easy to decompose, it is still quite value. Mordant available lime, aluminum, tin, copper, iron, hair color will produce different results. 3. Reduction of staining: some dyes such as the need to adopt to restore natural indigo dye staining method, the synthesis of dyes with the same principle. Almost the same process. 4, natural dyes and synthetic dyes differences: Some natural dyes solubility in water is small, staining is often necessary to achieve a certain depth of dyed several times. Optimum dyeing process should be based on the nature of the dye. Of particular note is that the same kinds of natural dyes, when using a different mordant dyeing, the dyed fibers will often show different hue. Also affected by temperature, liquor ratio dyeing time and other factors more, take a long time to explore and control. Natural dye fast, different dyes and different use of mordant dyeing time is different. A variety of different fibers in the dye rate and the mechanisms are different, even color. Through our use of the various devices found in the washing machine to use the current situation is better, Xianyou other equipment are not very satisfactory, needs Gaizao existing Shebei, Yi adapt Tianran dye staining. As for environmental protection, many of the existing aids are not easy to use, resulting in natural dye products is not high color fastness, poor reproducibility, and some products are still color phenomena, need to develop more natural additives to make up more than inadequate. This carried over: http://database.texnet.com.cn/db-technology/detail--1716.html

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