CHAPTER 1 FIBRE TO FABRIC
The fibres that are obtained from animals are called animal fibres.
We get wool from animals like sheep, goat, yak, etc. These animals have a thick coat of hair which traps a lot of air and hence keeps the animals warm as air is a poor conductor of heat.
There are two types of fibres obtained from the sheep:
(i) Coarse beard hair
(ii) fine, soft under-hair close to the skin
The fine hair is used to make wool. There are sheep which have only fine under-hair. Such sheep are a result of ‘selective breeding’ in which the parent6s are specifically chosen to give birth to such sheep. Animals that yield wool are yak, sheep, Angora goats, Llama, alpaca, camels, etc.
PROCESS OF CONVERTING FIBRES TO WOOL
Silk is obtained from silkworms. ‘Sericulture’ is the name given to the process of rearing silkworms for obtaining silk.
It is the female silk moth that lays eggs. When these eggs hatch, a larva comes out which is called a ‘caterpillar’ or ‘silkworm’. When the caterpillar grows and enters the next stage of its life cycle, which is called ‘pupa’, it weaves a net to hold itself. It secretes a silk fibre and covers itself with it. This covering is called ‘cocoon’.it is from the cocoon that the silk yarn is obtained. Mulberry silk moth is the most common silk moth.
PROCESS OF CONVERTING COCOON TO SILK