2019 Level-4 Term-I paper on Dyeing & Printing-II (WPE 441) from BUTEX affiliated colleges, 105 marks. Questions address substantivity and affinity, Freundlich isotherms, pigment printing chemistry, blended fabric dyeing, and colour fastness testing methods.
Level-4 Term-I, Final Exám-2019
Subject: Dyeing & Printing-II (Code: WPE 441)
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 substantivity, affinity and exhaustion.
(b) Write down the possible ways for anchoring of dyes with fibres.
(c) Discuss briefly the causes of dye aggregation.
[6+6.5+5=17.5]
2. (a) What is dyeing isotherm?
(b) Describe the Freundlich isotherm
(c) State the different faults in dyeing and their remedies.
(d) Describe the free volume model.
[2+4.5+6+5=17.5]