How to use the simple combustion method to inspect textiles?

Simple combustion method:
  Cotton, it burns when exposed to fire, has a fast speed, is a yellow flame, has a slight grayish white smoke and the smell of burning paper, and the charred embers are soft and dark gray.

   Hemp fiber: Similar to cotton, but the ashes are off-white.

Wool, non-flammable, first crimps when it is burned, the fiber is bubbly after burning, the flame is orange, the smell of burning protein, the burning speed is faster than cotton, there are more ash, and it is in a shapeless dark brown shape. It is pressed by hand. Broken into loose powder.

  Silk: The burning shape is similar to wool fiber. It is first rolled into a ball, burning faster than wool, and has a protein taste, but the smell is smaller than wool. After burning, it was a small brown ball.

   viscose fiber: similar to cotton, it burns faster than cotton, yellow flame, smell of burning paper, and the ashes are gray or light gray.

  Polyester: When burning, dripping molten material, the flame is blue. There is black smoke on the top, a slightly aromatic smell, and the ashes are hard, and the fingers will break when they are crushed.

   Nylon: It is not easy to burn, it will curl up when it is exposed to the fire, the melt is transparent gelatinous, it can be pulled out while it is hot, and it has the taste of celery. The ashes are not fragile.