TEXTILE CHEMICAL PROCESSING

Time allowed : 2½ hours

Maximum Marks : 50

General Instructions :
(i) All sections are compulsory.
(ii) Use diagrams wherever possible.

SECTION – A

1. Match the items in List – I with the items in List – II :
List – I List – II
(a) Bleaching (i) Azoic colours
(b) Singeing (ii) Wool
(c) Naphthol (iii) Water-mark effect
(d) Direct Dyes (iv) H2O2
(e) Moiring (v) Hairiness
(f) Felting (vi) Cotton

SECTION – B

Write very short answers.
2. Why do natural fibres have more impurities than synthetic fibres ?
3. What are the differences between dyes and pigments ?
4. Write a short note on burn-out prints.

5. What are the objectives of calendaring ?
OR
What are the advantages of heat transfer printing ?

SECTION - C

Write short answers in 50-75 words.
6. Why is mercerisation an important finish for cotton ?
7. Write a note on degumming of silk.
8. What are the features of reactive dyes ?
9. Describe the process of dyeing acrylic with basic dyes.
OR
Write the steps in dyeing of cotton with sulphur dyes.
10. Compare direct and discharge styles of printing.
11. Write a note on Roller Printing.
OR
Write a note on Flock Printing.

12. How can you achieve anti-microbial properties on cotton fabrics ?
OR
Explain the process of achieving stain-repellency on fabrics.

SECTION - D

Write descriptive answers in 100-150 words :
13. What are ‘Natural’ and ‘Added’ impurities on fabrics ? How are these impurities removed from cotton fabrics ?
14. Explain the process of dyeing wool with acid dyes.
OR
Explain the process of dyeing cotton with azoic colours.
15. Describe the purpose and process of pharchmentisation.
OR
Give the classification and objectives of finishing.
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Courtesy: CBSE