The conical black or white board used for detecting non-smoothness, feathering and other errors at the thread sample by winding it at predetermined extent and range. It can wind at variable speed from 8 to 19 windings per centimeter. One white conical board is given with the device as Standard. The Standard photographs ASTM which are required to compare can be supplied optionally. ASTM photographic yarn view Standard (ASTM D2255)
STANDARD 1-12 COUNTING
STANDARD 12-24 COUNTING
STANDARD 24-36 COUNTING
STANDARD 36-50 COUNTING
STANDARD 50-75 COUNTING
STANDARD 75-135 COUNTING

STANDARDS : ASTM D2255