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What does excess intake of fats lead to?
Activity:
To observe different types of yarns by burning them.
Experiment:
Pull out six to eight yarns from the fabric. Hold one end of the yarn with a tong and bring the other end over the flame of a candle.
Observation and Inference:
- If the yarns burn but do not shrink or melt, and give an odour similar to the burning of paper, then it is cotton yarn.
- If yarn shrinks away from the flame and burns but does not melt and has the odour of charred meat, then it is silk yarn.
- If the yarn shrinks and burns but does not melt and has a strong odour of burning hair, then it is wool yarn.
- If the yarn shrinks and burns. They also melt and give out an odour similar to burning plastics, then it is a synthetic yarn.
Updated on: 10-Oct-2022
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