Level-3 Term-I 2016 exam on Dyeing & Printing-I (WPE 341) from BUTEX affiliated colleges. Topics include dyeing theory, hot brand reactive dyeing of cotton, vat dye mechanisms, acid dye on wool, and thickener preparation for printing.
Level-3 Term-I, Final Exám-2016
Subject: Dyeing & Printing-I (Code: WPE 341)
Time: 3.0 Hrs. Full Marks: 105
(Use separate answer script for Part: A and Part: B)
(All parts of a question must be answered consecutively)
Part: A
(Answer any three questions)
1. (a) Define Chromophore, Chromogen and Auxochrome of dyestuff with example.
(b) Describe the theory of dyeing.
(c) Write down the differences between dyeing and Printing Processes.
[6+5.5+6=17.5]
2. (a) State the properties of Reactive dyes.
(b) Write down the process of hot brand Reactive dyeing for cotton fabric.
(c) Briefly discuss the factors for which direct dye is substantive.
(d) Show the general structure of reactive dyes and the structures of procion yellow.