Dyeing and Printing-I paper (WPE 341) from BUTEX affiliated colleges' 2018 Level-3 Term-I finals, carrying 105 marks. Questions cover chromophores, direct, reactive, vat, and basic dyes, plus printing styles and paste ingredients.
Level-3 Term-I, Final Exám-2018
Subject: Dyeing and 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, Auxochrome and Chromogen.
(b) Classify dyestuff.
(c) Write down the characteristics of dyestuff.
(d) State the differences between dyes and pigments.
[6+4+4+3.5=17.5]
2. (a) State the properties of direct dyes.
(b) Why direct dyes are so called?
(c) Why direct dyes are not widely used in textile Industry?
(d) State the application process of direct dye with recipe.
[4+3+3+7.5=17.5]