Textile Coloration-II exam (WPE 401) from BUTEX affiliated colleges' 2024 Level-4 Term-I finals. Topics span dye aggregation, the free volume diffusion model, dyeing rate, pigment dyeing with binders, azo and sulphur dyeing, and transfer printing methods.
Level-4 Term-I, Final Exám-2024
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) Define aggregation number. What do you mean by dye aggregation?
(b) Mention the reasons of dye aggregation in dye bath.
(c) Which steps should be taken to prevent dye aggregation?
[4+6+2=12]
2. (a) What is diffusion? Explain the free volume model of diffusion.
(b) Briefly discuss about the forces that exist in dye-fiber interaction system.
(c) Explain the term “Diffusion co-efficient”.