Draw well-labeled diagrams of (a) Steps involved in processing of wool. (b) Life cycle of a silk moth.
Answers
Hiii friend...
A. The major steps necessary to process wool from the sheep to the fabric are: shearing, cleaning and scouring, grading and sorting, carding, spinning, weaving, and finishing..
Wool comes mostly from sheep. It was the first fibre to be spun into yarn and it provides more warmth than other animal fibres. Apart from sheep, wool also comes from the angora goat, yak, llama, alpaca, and even camels. All these animals have a thick coat of hair or fleece, which keeps them warm. Wool is obtained from this fleece.
Shearing is the first step in processing fibre into wool. It is the removal of the fleece of the sheep along with a thin layer of the skin.
The next step is to clean the sheared skin and hair. This is done in big tanks to remove the grease, dust and dirt. This is called scouring.
The fleece is sorted according to its texture and type
Since the fibres are mostly black, brown or white in colour, they can now be dyed in various colours.
Once the dyeing process is complete, the fibres are straightened, combed and rolled into yarn.
The longer fibres are made into wool for sweaters, while the shorter fibres are spun and woven into woollen cloth.
Life cycle of silk moth.
