Question

You can do an activity to identify the yarns of a fabric under the supervision

of your teacher or parents. 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.

Observe carefully. Do the yarns shrink away from the flame? Do the yarns

melt or burn? What type of odour is given off? Note down your observations.

If these are cotton yarns, they burn but do not shrink or melt. The burning

yarn gives an odour similar to burning paper. The silk yarn shrinks away

from the flame and burns but does not melt. It has the odour of charred meat.

The wool yarn also shrinks and burns but does not melt. It has a strong odour

of burning hair. The synthetic yarns shrink and burn. They also melt and

give out an odour similar to burning plastics.​

Answer 1

Answer:

Explanation:

Using tweezers hold the yarn to the edge of a flame. Observe the changes.  If it smells like burning hair, the yarn is wool or silk.  If it smells like burning paper, the yarn may be cotton, or rayon.

Answer 2

Answer:

try to look at your self

of burning hair. The synthetic yarns shrink and burn. They also melt and

give out an odour similar to burning plastics.

Explanation:

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