Abstract
In order to simulate the slugs occurrence states on the fabric by measuring the slugs on the dupion silk in the silk reeling process, the authors formed the slugs measurement apparatus by laser, and examined the analysis method for detecting the slugs from the measurement wave forms indicating the thickness of dupion silk. As a result, it was confirmed to be able to infer the slugs occurrence states on the fabric by actual measurement or sampling measurement of the slug length and the distance between slugs on the dupion silk.