The pretreatment of yarns, knitwear, and fabrics is often a science. Before a fiber can be uniformly dyed, pretreatment must be carried out. Here, in addition to the accompanying natural substances, sizing and preparations are also completely removed. The bleaching process, which is also part of the pretreatment, ensures that untreated textiles are lightened and can then be dyed in light shades without any problems. Ultimately, pretreatment involves more than just cleaning.
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