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1.1 ,This test method covers the measurement of yarn number of filament and spun yarns using automated testers. Some of the instruments are stand-alone and others are optional modules for instruments that perform additional tests.
1.1.1 ,The instruments are capable of measuring yarn numbers up to 4000 dtex (3600 denier).
Note 1: ,For determination of yarn number by use of reel and balance, refer to Test Method D1907.