Chemical Processing

Impurities in natural fibre;
Chemistry and practice of preparatory processes for cotton;
Preparatory processing of wool and silk;
Mercerization of cotton;
Preparatory processes for manmade fibres and their blends;
Optical brightening agent.
Classification of dyes;
Dyeing of cotton, wool, silk, polyester, nylon and acrylic with appropriate classes of dyes;
Dyeing of polyester/cotton and polyester/wool blends;
Dyeing machines;
Dyeing processes and machines for cotton knitted fabrics;
Dye-fibre interaction;
Introduction to thermodynamics and kinetics of dyeing;
Brief idea about the relation between colour and chemical constitution;
Beer-Lambert’s law;
Kubelka-Munk theory and its application in colour measurement;
Methods for determination of wash, light and rubbing fastness.
Methods of printing such as roller printing and screen printing;
Preparation of printing paste;
Various types of thickeners;
Printing auxiliaries;
Direct styles of printing of
(i) cotton with reactive dyes,
(ii) wool, silk, nylon with acid and metal complex dyes,
(iii) polyester with disperse dyes;
Resist and discharge printing of cotton, silk and polyester;
Pigment printing;
Transfer printing of polyester;
Inkjet printing;
Printing faults.
Mechanical finishing of cotton;
wrinkle resistant,
water repellent,
flame retardant and enzyme (bio-polishing) finishing of cotton;
Milling, decatizing and shrink resistant finishing of wool;
Antistatic and soil release finishing;
Heat setting of synthetic fabrics;
Minimum application techniques.
Pollution control and treatment of effluents.