A Study on the Hidden Portion of the Fiber Beard in Cotton Length Measurements

The beard method is used for making a fiber beard, and then this beard is scanned to generate a fibrogram. Cotton fiber length parameters, such as Mean Length and Upper Half Mean Length, can be derived from the fibrogram. The method used for making such a beard impacts the resulted fibrogram. Therefore could influence the derived length parameters. One aspect regarding the beard method is that, when making a beard, a portion of the sampled fibers is held in the instrument and not tested. In this paper, we report a research studying the hidden fibers with experimental data and numerical simulations, analyze the characteristics of these hidden fibers, and discuss the influences from these characteristics.