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Advanced Study Dyeing and Printing
Paper Code:
HCT 144 B
Credits:
4
Contact Hours:
60.00
Max. Marks:
100.00
Objective:
- To study the use of various dyes and auxiliaries
- To understand the concept of dyeing & printing of various substrates with different classes of dyes.
12.00
Unit I:
UNIT I
- Advances in chemistry of dye intermediates and unit organic processes applied for their application. Colour and chemical constitution
- Chemistry of various synthetic dyes for application on textile fibers, novel chromophores and reactive groups, newer application techniques, Developments in dye chemistry
- Photochemistry of dyes, Solvent dyes, optical brightening agents and pigments. Azo ban, the forbidden amines, anomalies and testing.
- Natural dyes- concept and practice, classification, technology for production and application of natural dyes on textiles
12.00
Unit II:
UNIT II
- Thermodynamics of dyeing and Kinetics of dyeing
- Influence of fiber structure on dyeing, effect of processes on fiber properties before dyeing and during dyeing, Solubility parameter, cohesive energy density and interaction between dyes and polymers
- Application of dyes on various substrates- natural, synthetic and blends
- Advances in preparatory processes, time and energy saving techniques, Combine preparatory processes, Processing of textured man-made fibers
- Rapid dyeing techniques, Foam dyeing, dyeing using supercritical carbon dioxide and other advanced dyeing techniques.
- Developments in dyeing machineries and dyeing defects
12.00
Unit III:
UNIT III
- Printing- Methods (block, roller, screen -flat bed, rotary, transfer, digital, flock, laser) & styles of printing
- Printing with
- Printing with natural dyes using block, roller, screen (flat bed and rotary screen), transfer, digital and flock
- Finishing and After treatment of printing
- Developments in transfer printing of natural as well as synthetic dyes, Digital printing – Inkjet printing and Xerography, Concept of continuous processing.
- Developments in printing machineries and printing defects
12.00
Unit IV:
UNIT IV
- Dyeing and printing auxiliaries- Wetting agents, electrolytes, solvents, dispersing agents, oxidizing agents, reducing agents, cationic fixing agents, sequestering agents, retarding agents, carriers, hygroscopic agents, stabilizers and discharging agents
- Thickening agents – natural, modified and synthetic
- Importance of textile testing, Standard conditions of testing, standardization and quality control
- Fabric Testing- Strength properties – tensile, bursting, tear and dimensional stability
- Performance properties – resistance to abrasion, pilling, wrinkling and burning
- Colorfastness – light, washing, dry cleaning, perspiration, saliva & ironing
- Quality parameters for fabrics suitable for various end uses - apparel, household and industrial textiles
12.00
Unit V:
UNIT V
- Wastes from textile and apparel industry: Environmental impact of dyeing, printing & finishes, Indian & International environmental legislations
- Harmful dyes and chemicals, Toxicology of synthetic colorants and chemicals
- Environmental impact of dyeing & printing.
- Health and safety requirements
- Introduction to Effluent Treatments of Textile and Apparel industry
- Effluent Treatment plants used in wet processing.
Essential Readings:
- Shenai VA. 1994. Technology of Dyeing. Sevak Publ.
- Shenai VA. 1985. Technology of Printing, Technology of Textile
- Vilensky G. 1987. Textile Science. CBS.
- Pradeep V Mehta. 1998. Managing Quality in Apparel Industry. New Age International.
- Ruth Glock. 1990. Apparel Manufacturing. Macmillan Publ.
- Booth, J.E., Principles of Textile Testing, Newness Butter Worth, London
References:
- Hall AJ. 1955. Handbook of Textile Dyeing & Printing. The National Trade Press.
- Joyce Story. 1974. The Thames & Hudson Manual of Textile Printing.
- Thames & Hudson. Processing. Vol. IV. Sevak Publ.
- Sule AD. 1997. Computer Colour Analysis Textile Application. New Age International.
- Vidyasagar PV. 1998. A Handbook of Textiles. Mittal Publ.
Academic Year:
