Amity University 2007 B.Tech Plastic and Polymer Engineering LT341 – PRACTICE OF LEATHER MANUFACTURE - II - Question Paper

ANNA UNIVERSITY :: CHENNAI – 600 025

MODEL ques. PAPER
VI - SEMESTER
B.TECH. LEATHER TECHNOLOGY
LT341 – PRACTICE OF LEATHER MANUFACTURE - II

Time: 3hrs Max Marks: 100

ans ALL ques.
PART – A (10 x two = 20 marks)

1. elaborate the best raw materials for glace kid and cabretta leathers?

2. What is the objective of myrobing in E.I. tanning?

3. Justify your option of a deliming agent for gloving leather.

4. Mention the cause for grain cracking of a wet blue leather.

5. Contrast the properties of upper Vs lining leather.

6. Drape is for _____________ whereas ____________ is for gloving leather.

7. Mention 2 demerits of a protein finish.

8. What is meant by VOC?

9. What is meant by double hiding?

10. What is the reason for fatty spue on leather?

PART – B (5 x 16 = 80 Marks)

11. define a process with rationale for the production of glace kid upper leather starting from a suitable raw material.

12.a) explain the strategies for the production of suede garment leathers starting from wet blue goat skins and compare the identical with process technology for making the identical from E.I.skins.

OR

12.b) define a process with justification for the production of full chrome goat nappa leathers.

13.a) Detail a process for the production of a double face garment leather starting from a suitable raw material.

OR

13.b) define a process for the production of formaldehyde and fish oil free chamois leather from wet salted skins.

14.a)i) explain the suitability of E.I. and wet blue leathers for the manufacturing of lining leathers. (6)

ii) Outline a process with rationale for the production of lining leather from a suitable semi tanned leathers. (10)

OR

14.b) Write short notes on

(i) Ostrich skin processing
(ii) Nappalan finish
(iii) Screen printing
(iv) Foam finish

15.a) define a process technology for the production of gloving leather from wet salted sheep skins.

OR

15.b) Write short notes on

(i) Enzymes in beam house operations
(ii) Wet white leathers
(iii) Polyurethane binders
(iv) Top coat for white leathers.

Earning:   Approval pending.