Dyeing Technology

Paper Code: 
TEX -302
Credits: 
02
Contact Hours: 
30.00
Max. Marks: 
100.00
Objective: 

1. To understand concept of design as related to fabric through dyeing. 2. To enhance awareness and appreciation of art and aesthetics through dyeing.

5.00
Unit I: 
treatments for dyeing-Sizing, Desizing, singeing

 

  • Cotton-scouring, bleaching, desizing
  • Wool- scouring, bleaching, carbonizing
  • Silk- Degumming, scouring, bleaching
5.00
Unit II: 
Dye Auxillaries

 

  • Role and function of  dyeing auxiliaries- Exhausting agents, Wetting agents, Carriers, pH regulators, swelling agents used in dyeing.
  • Theory of dyeing-
    1. Role of -dye molecules, Water, temperature
    2. Various terms frequently involved in dyeing- affinity/substantivity, concept of shade percentage, MLR ( material to liquor ratio), OWG (on weight of gods), OVL(on volume of liquor.
10.00
Unit III: 
Classification of dyes

 

·         Synthetic dyes-Properties  & methods of application

a. Readymade dyes-Water soluble & insoluble

b. Developed dyes- Water soluble & insoluble

·         Natural dyes-

a. Various sources

b. Principle of dyeing with natural dye on different fiber

Role of mordent                                                                   

5.00
Unit IV: 
Stages of dyeing-

 

·         Fiber dyeing, Yarn dyeing, fabric dyeing, garment dyeing-types, advantages, disadvantages.

·         Union & cross dyeing

5.00
Unit V: 
Care Of Dyed Fabric

 

  • Dyeing Defects & their remedies.
  • Laws & regulations and environmental issues related to dyes & dyeing.

Care of dyed fabrics.

Essential Readings: 

 

1.      Kadolph Sara J, Langford Anna L.: Textiles Upper saddle  River, New Jersey

2.      Gulrajani M.L. and Gupta D: Natural dyes and their application to textiles, IIT Delhi.

3.      Shenai V.A.: Chemistry of Dyes and Principles of Dyeing, Sevak  Prakashan Mumbai.

                                                               

References: 

 

1.      Lubs, H.A. & E. Robert., the Chemistry of Synthetic Dyes and Pigments, Kreiger Publishing Company, New York.

2.      Venkatraman, K., (1970) Chemistry of Synthetic Dyes, Part I and Part II.

3.       Joseph, M. Introductory Textile Science, Molt Rinchart and Winston.

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