Examples of evalutaion have been obtained by the new optical method described in the previous instalment.1. Quantity of whole hairs. Both the quantity of reflected light and the number of ends of hairs have been shown.2. Length of hairs The relation between the quantity or number and the length of hairs has been obtained accurately.3. Hairiness of blended yarns The components of the hairs of a yarn in which two kinds of fibers are blended can, to some extent, be sorted.4. Others Inter alia, the periodic irregularity of hair quantity along the yarn axis has been obtained.
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Kubota et al. (1966) studied this question.
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