PUMPA - SMART LEARNING
எங்கள் ஆசிரியர்களுடன் 1-ஆன்-1 ஆலோசனை நேரத்தைப் பெறுங்கள். டாப்பர் ஆவதற்கு நாங்கள் பயிற்சி அளிப்போம்
Book Free DemoYarns of a fabric:
- 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?
The cotton yarns , but they or . The burning yarn gives an odour of .
The silk yarn in the flame and , but it . The burning yarn produces an odour of .
The wool yarn and but . While burning, it has a strong odour of .
The synthetic yarns away from the flame. The yarns and . It gives out an odour similar to .
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