• Categories:Industry news
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• Time of issue:2020-12-23 10:15

(Summary description)1、 After anodizing, it can only be cleaned with cold water, not hot water, and not touched with hands, so as to prevent the dyeing effect from being affected. In addition, in order to prevent the residual acid from being brought into the dyeing tank, neutralization treatment can be carried out in the solution containing 10-30 ml / L ammonia or 50 g / L sodium carbonate after anodization if necessary. 2、 Coloring should be carried out immediately after anodizing cleaning. If the time is too long, it should be soaked in 10% acetic acid (phosphoric acid, oxalic acid, tartaric acid or citric acid) for 10 minutes at room temperature before dyeing to improve the dyeing performance of organic dyes. 3、 When the dyeing solution is turbid, it should be filtered in time. Because the turbid dyeing solution will cause these solid particles to penetrate into the pores, the surface brightness of the dyed cloth will obviously decrease, and the beauty will be affected. 4、 The temperature of dyeing solution should not be too high (80-90 ℃), otherwise the dye molecules will not be able to penetrate completely, resulting in too light color, too low dyeing fastness and even surface blooming.