How to determine the cotton and linen of cotton and linen:

How to determine the cotton and linen of cotton and linen:

Both cotton fiber and hemp fiber are burning near the flame, burning rapidly, the flame is yellow, and blue smoke is emitted.

The difference between the two smells of burning and the ash after burning is that the cotton burns to emit a paper smell, and the hemp burns to give off the ash smell of grass; after burning, the cotton has very little powder ash, which is black or gray, and the hemp produces a small amount of grayish white powder ash.

The color of the flame produced by the burning and the odor generated after burning can be easily discerned. To put it simply, the cotton and linen are burned with fire, and it is gray, not cotton or induration.