Textile Coloration-II question paper (WPE 401) from the 2023 Level-4 Term-I finals at BUTEX affiliated colleges. Topics include dye-fibre interaction theories, dye transport zones, carrier dyeing of polyester, sulphur and pigment dyeing, and burn-out printing.
Level-4 Term-I, Final Exám-2023
Subject: Textile Coloration-II (Code: WPE 401)
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-fiber interaction? State the name of the theories of dye-fiber interaction.
(b) Write a short note on the following Dye-fiber interaction: i) Physical theories ii) Chemical theories iii) Solid solution theories iv) Pigment or mechanical theories.
[4+8=12]
2. (a) Briefly discuss the three transport zones of dye transport mechanism.
(b) Briefly discuss the term dyeing rate. Show that dyeing rate ∝ 1/√tex.
(c) Discuss the mechanism of dyeing.