Protein Fibres

Question 1

Mothproofing finishes

Answer 1

Protein fibres such as wool can be attacked by moths. Mothproofing finishes can either give off an odour that repels the mature moth and prevents the depositing of eggs (as do naphthalene or mothballs) or they can emit a gas that kills the mature moth and the larvae. Wool should not be stored in a soiled condition and cupboards should be kept clean.

Question 2

Enzyme:

Answer 2

Large protein produced by living organisms to catalyse chemical reactions

Question 3

Enzymatic finishes

Answer 3

Bio-finishing uses enzymes to produce permanent effects, mainly on cellulosic fabrics. Bio- finishing effects produced by cellulose enzymes include antipilling, softening and increased smoothness and lustre. There are many other types of enzyme used in textile processing and care. Enzymes are used in washing powder to remove protein stains. As finishing agents, they are also used to shrink-proof (anti-felt) and improve the hand of wool and mohair, in the degumming of silk, and to remove starch size.