Question

why need to do pretreatment before dyeing of textile?​

Answer 1

Explanation:

For using of cotton fabric we have design and colored with different processes. Pretreatment is a process for prior fabric dyeing which involves scouring and bleaching. ... These chemicals not only remove the impurities, but also attack the cellulose, leading to a reduction in strength, fabric weight loss

Answer 2

Pretreatment is a heart of processing of textile. In Pretreatment, all these impurities are removed and fabric is brought to a stage where it is more absorbent and white and can be easily processed further. The process which is done to make the textile materials suitable for dyeing and printing.