how to test fibres

There are many ways to check the quality of fabric by doing many experiments. As now a days we can see lots of shops in bazar selling pashmina or cashmere for 100 rs to 500 Rs. but basically they are viscose or rayon scarfs. But one can really test the quality before purchasing any expensive shawls.  one can do also burning tests  eg. we are atatching a video and some infornmation .

• CottonBurns, but does not melt, It has the odor of burning paper
• leaves  or wood. The residue is a fine, feathery, gray ash.
• Hemp Same as cotton
• Linen Same as cotton
• Ramie  Same as cotton
• Rayon  Same as cotton
• Silk Burns, but does not melt. It shrinks from the flame. It has the odor of charred meat. The residue is a black, hollow irregular bead that can be easily to a gritty black powder. It is self-extinguishing, i.e., it burns itself out.
• Wool  Burns, but does not melt. It shrinks from the flame. It has a strong odor of burning hair. The residue is a black, hollow irregular bead that can be easily crushed into a gritty black powder. It is self-extinguishing, i.e., it burns itself out.