LESSON-3 Animal Fibres
Sumeet Beniwal UPSC B.Sc (Medical) UPSC Aspirant Hobbies Teaching Debating Reading Cooking Follow me unacademy http://unacademy.com/user/sumi28796
Animal Fibres Wool Animals that yield wool: sheep, goat, yak, cameland some other animals. . derived from these hairy fibres. . Sheep has two types of fibres (i) the coarse beard hair, (ii) the fine soft under-hair close to the Skin that provide the fibres for making wool
From fibres to wool: Rearing and breeding of sheep: o Sheep are herbivores and rearers also feed them on a mixture of pulses, corn, jowar, oil cakes these sheep are "selectively bred" with one parent being a sheep of good breed Once the reared sheep have developed a thick growth of hair, hair is shaved off for getting wool .
Quality of wool States where found Good quality wool Rajasthan, Punjab S.No Name of breed Lohi Uttar Pradesh, Himachal Pradesh Rajasthan, Punjab, Haryana Jammu and Kashmir Gujarat Gujarat Rampur bushairBrown fleece Nali Bakharwal Marwari Patanwadi Carpet wool For woolen shawls Coarse wool For hosiery 4
Processing fibres into wool: . Step l: o The fleece of the sheep is removed. This process is called shearing. o Hair are removed during the hot weather. . Step Il: Hair is thoroughly washed in tanks to remove grease dust and dirt. This is called scouring
Step III: The hairy skin is sent to a factory where hair of different textures are separated, this is called sorting. . The sorter get infected by a bacterium, anthrax, which causes a fatal blood disease called sorter's disease Step IV: o The small fluffy fibres are picked out from hair. o The fibres are scoured again and dried Step V: The fibres can be dyed in various colours Step VI: The fibres are straightened, combed and rolled into yarn
Life history of silk moth The rearing of silkworms for obtaining silk is called sericulture. Egg is the first stage of a silkworm's life cycle. The second stage is that of larvae which are called caterpillars or silkworms. It swings its head from side to side and during these movements it secretes fibre made of protein. Soon it covers itself by silk fibres and turns into pupa. This covering is known as cocoon. The silk yarn (thread) is obtained from the cocoon of the silk moth The most common silk moth is the mulberry silk moth.
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