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
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