It is very difficult to distinguish good cotton from bad cotton, which can generally be identified by the following methods:

The first is the eye view. Generally speaking, black heart cotton looks impure, with impurities, even yarn ends or rags; And high-quality cotton is white, and there won't be too much dust.

The second is nose smell. High-quality cotton has no pungent smell when burning; However, black-heart cotton is bleached when it is processed, which smells slightly sour and has obvious pungent smell when burned.

The third is touching by hand. High quality cotton feels soft and elastic, while black heart cotton feels rough and inelastic.

The fourth is tearing. Generally speaking, black-hearted cotton breaks when it is pulled, and high-quality cotton is not easy to break.