Unit 1 General introduction and objectives of preparatory processes of

• cotton fabric
• An overview on various types of impurities present in cotton fabric 3 6

Unit 2 Preliminary inspection and mending of grey cotton fabric

• lot number
• sort number
• spot cleaning

Unit 3 Shearing and Cropping

2 lecture hours

• process and machinery

Unit 4 Singeing

• construction and working of different types of machines
• advantages and disadvantages of these methods. 3 6

Unit 5 Desizing

• different methods of desizing
• chemistry and process
• merits and demerits these desizing methods. 5 9

Unit 6 Scouring of white and coloured woven cotton goods

• Technological routine
• various ingredients
• processes etc. 8 14

Unit 7 Bleaching of cotton fabric

• Techno-chemical aspects
• ecological aspects and merits and demerits of following bleaching agents: Chlorinated bleaching agents-Calcium hypochlorite
• Sodium hypochlorite etc: Formation of oxycellulose
• copper number
• cupraammonium fluidity
• etc. 10 8 18 14 Peroxides- Hydrogen peroxide: Role and types of catalysts and stabilizers Peracetic acid 2 4

Unit 8 Machineries for scouring and bleaching of cotton fabric

• Batch- wise
• semi-continuous and continuous 5 9

Unit 9 Recent developments in processing methods and machineries for

• cotton preparatory processes 2 4

Unit 10 Principle, classification, chemistry and applications of optical

• brightening agents 3 6