Remarks:
Concentrated Silicone Emulsions
Pretreatment Chemicals are used to convert raw fiber, yarn, or fabric into substracts suitable for dyeing printing and finishing. These fibers, yarns, fabrics could be of cotton, wool, silk, synthetics and blends of those. The pre treatment processes include :Concentrated Silicone Emulsions
Desizing
Scouring, wetting (removal of oils, waxes, dirt, etc thus imparting absorbency)
Bleaching (removal of natural coloring matter)
Mercerizing (increasing dye-ability, lustre and strength)
Pretreatment requirements are as follow:
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 the problems encountered in finished fabrics are directly attributed to lack of proper preparation.
