Unit 1: INTRODUCTION
8 hrsWet processing. Areas and importance. Preparation process. Dyeing Process. Finishing process.
BFAD · Sem 3 (Core)
Wet processing. Areas and importance. Preparation process. Dyeing Process. Finishing process.
Introduction to dyeing, preparation of fabric for dyeing. Classification of dyes on the basis of origin and their application. Stages of dyeing- solution or dope dyeing, yarn dyeing, fabric dyeing or piece dyeing, product dyeing. Methods of dyeing- batch dyeing, winch dyeing, jig dyeing, pad dyeing, package dyeing, combination dyeing, jet dyeing, paddle machines, continuous machines. Special dyeing effects- cross dyeing, union dyeing, tone on tone. Dyeing defects. Colour fastness- importance of colour fastness to the consumer, evaluation of colour fastness, factors influencing colour fastness, assessing colour fastness of different fabrics to laundering, light/sunlight, perspiration, crocking, equipment used to test colour fastness.
Introduction to printing. Basic styles of printing- direct, resist, discharge, mordant, heat transfer printing. Methods of printing- block, stencil, screen, rotary and roller printing, duplex printing. Printing defects.
Introduction to finishes, importance of finishes. Classification of finishes- permanent and non -permanent finishes. Basic or routine finishes-singeing, desizing, scouring, bleaching, stiffening, weighting, calendaring, tentering, mercerization. Aesthetic finishes- special calendaring (schreinering, moiré embossed surface, glazed finish), acid finishes, alkali finishes, softening finishes, stiffening finishes, fading finishes. Functional finishes- absorbent finishes, antistatic finishes, abrasion resistant finishes, stain and soil resistant finishes, durable press finishes, shrink resistant finishes, flame resistant finishes, flame retardant finishes, water repellent and water proof finishes, antimicrobial finishes, moth proof finishes, microencapsulation finishes.
Washing (hand and machine), drying, ironing, bleaching, dry cleaning. Labels- types of labels (brand labels, size labels, care labels), importance of fabric care labels, study of care symbols, etc.
Environmental issues – air pollution, water pollution, solid waste pollution. Sustainability in production of textile. Corporate social responsibility in textile industry.
After completion of the course student will be able to:
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