Name: Discovery of Silk
Uploaded: 2019-07-19
Duration: 4 min 52 s
Description: Silk is the queen of fabrics. It routes from China. Silk is considered a luxury fabric. Let us learn all about this fabric it in this video!

Question

Explain how wool yarn is produced from the fleece of sheep.

Accepted Answer

The production of wool yarn from the fleece of sheep involves various steps namely shearing, scouring, sorting or grading, dyeing, drying, carding and spinning. Shearing is the process of removing the sheep's fleece along with a thin layer of skin. The raw sheared wool is washed clean of dirt, dust, grease and other impurities in large tanks full of hot water and detergents. This process is called scouring. The process of separating the hair of different textures is called sorting. Grading involves grouping wool according to its length, colour, texture and ease of dyeing. The wool is passed through a series of metal teeth that straighten the fibres and remove remaining impurities. Small, fluffy fibres called burrs are picked out from the hair.

Wool is generally creamy white. However, some breeds of sheep produce black, brown or grey wool. The fibres are dyed in various colours depending on the requirement in the dyeing process. The wool is washed properly after dyeing it. In this process, wool is put through rollers to squeeze out water and speed up the drying process. The fibres are made into long straightened strands during the process of carding. In the spinning process the wool fibres are spun into yarn. The longer fibres are spun into wool for knitting sweaters. The shorter fibres are woven into woollen clothes or carpets.

Explain how wool yarn is produced from the fleece of sheep.

Important Questions on Fibre to Fabric

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