Dyeing Technology

Paper Code: 
BTX-302
Credits: 
3
Contact Hours: 
45.00
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.
10.00
Unit I: 
Pre- treatments for dyeing-Sizing, Desizing, singeing
  • Cotton-scouring, bleaching, desizing
  • Wool- scouring, bleaching, carbonizing
  • Silk- Degumming, scouring, bleaching
15.00
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

          c. Role of mordant

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. 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.

 

References: 

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.

  • Printer-friendly version
  • PDF version