After the cotton is ginned, a sample is taken from each bale and sent away to classing rooms to have it graded for its quality. The cotton fibre is sorted into different quality-based grades (or classes). The Higher the class, the better the quality of the cotton fibre, and the higher the price that will be paid.
The more traditional method of testing cotton quality involves using specially trained classers who manually examine the cotton fibres. This testing involves the classer taking a sample from each bale of cotton and assessing it by :
* Colour (bright or dull, white or grey)
* Trash content (the amount of stalk, leaf or dirt)
* Character (whether the sample has a smooth or lumpy appearance)
* Staple (length of fibre)
* Strength of the fibres
Manual classers still largely determine the leaf, extraneous matter and preparation grades of cotton.
Posted in: Cotton