Textile Coloration-I paper (WPE 301) from the 2022 Level-3 Term-I finals at BUTEX affiliated colleges. Questions cover dye properties, vatting mechanisms, batch-wise reactive dyeing of cotton, exhaustion curves, mordants, and printing ingredient functions.
Level-3 Term-I, Final Exám-2022
Subject: Textile Coloration-I (Code: WPE 301)
Time: 3.0 Hrs. Full Marks: 72
(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) What is dye? Mention the properties of dye.
(b) Define chromophore, Chromogen and Auxochrome.
(c) Describe the exhaustion process of dyestuff to the fibre.
(d) Describe different types of dyeing faults and their remedies.
[2+3+3+4=12]
2. (a) Write down the properties of basic dye.
(b) What is vatting?
(c) Explain the mechanism of cotton fabric dyeing with vat dye.