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Pretreatment Chemicals Pretreatment Chemicals are used to convert raw fiber/yarn/fabric into substrates suitable for dyeing, printing and finishing. These fibers/yarns/fabrics could be of cotton, wool, silk, synthetics and blends of these. The pretreatment processes include: Desizing (Removal of size), Scouring/wetting (removal of oils, waxes, dirt etc. thus imparting absorbency), Bleaching (removal of natural colouring matter) and Mercerizing (increasing dye ability, luster and strength). Pretreatment requirements are as follows
- Uniformity and levelness of effects
- High absorbency
- Low ash content
- Freedom from size
- High degree of whiteness
- Absolute absence of husks
- High dye absorbing power
Thus Pretreatment occupies a critical position in wet processing. More than 60% of problems encountered in finished fabrics are directly attributed to lack of proper preparation. Pre-treatment Chemicals are used to convert raw fibre, yarn, or fabric into substrates suitable for dyeing, printing and finishing. These fibres/yarns/fabrics could be of cotton, wool, silk, synthetics and blends of these. The pre-treatment processes include:
- Desizing
- Scouring/wetting (removal of oils, waxes, dirt, etc. Thus imparting absorbency)
- Bleaching (removal of natural colouring matter)
- Mercerizing (increasing dye-ability, lustre and strength)
Pre-treatment requirements are as follows
- Uniformity and levelness of effects
- High absorbency
- Low ash content
- Freedom from size
- High degree of whiteness
- Absolute absence of husks
- High dye absorbing power
Thus pre-treatment occupies a critical position in wet processing. More than 60% of the problems encountered in finished fabrics are directly attributed to lack of proper Pretreatment Chemicals Pretreatment Chemicals are used to convert raw fiber/yarn/fabric into substrates suitable for dyeing, printing and finishing. These fibers/yarns/fabrics could be of cotton, wool, silk, synthetics and blends of these. The pretreatment processes include: Desizing (Removal of size), Scouring/wetting (removal of oils, waxes, dirt etc. thus imparting absorbency), Bleaching (removal of natural colouring matter) and Mercerizing (increasing dye ability, luster and strength). Pretreatment requirements are as follows
- Uniformity and levelness of effects
- High absorbency
- Low ash content
- Freedom from size
- High degree of whiteness
- Absolute absence of husks
- High dye absorbing power
Thus Pretreatment occupies a critical position in wet processing. More than 60% of problems encountered in finished fabrics are directly attributed to lack of proper preparation. Pre-treatment Chemicals are used to convert raw fibre, yarn, or fabric into substrates suitable for dyeing, printing and finishing. These fibres/yarns/fabrics could be of cotton, wool, silk, synthetics and blends of these. The pre-treatment processes include:
- Desizing
- Scouring/wetting (removal of oils, waxes, dirt, etc. Thus imparting absorbency)
- Bleaching (removal of natural colouring matter)
- Mercerizing (increasing dye-ability, lustre and strength)
Pre-treatment requirements are as follows
- Uniformity and levelness of effects
- High absorbency
- Low ash content
- Freedom from size
- High degree of whiteness
- Absolute absence of husks
- High dye absorbing power
Thus pre-treatment occupies a critical position in wet processing. More than 60% of the problems encountered in finished fabrics are directly attributed to lack of proper preparation.
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