1.1 This test method covers the determination of the percentage of mature fibers in a sample of loose, chemically untreated cotton fibers, whether taken before processing or unravelled from a textile product.
1.2 This test method gives two optional procedures for determining maturity, as follows:
1.2.1 Procedure 1—Sodium Hydroxide Swelling.
1.2.2 Procedure 2—Polarized Light. NOTE 1—For other test methods for the determination of maturity of cotton fibers refer to Test Methods D1464 and D2480.
1.3 The values stated in SI units are to be regarded as standard. No other units of measure are included in this standard.
1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
ASTM D1442-06(2012) Referenced Document
ASTM D123 Standard Terminology Relating to Textiles*, 2023-09-14 Update
ASTM D1440 Standard Test Method for Length and Length Distribution of Cotton Fibers (Array Method)
ASTM D1447 Standard Test Method for Length and Length Uniformity of Cotton Fibers by Fibrograph Measurement
ASTM D1464 Standard Test Method for Differential Dyeing Behavior of Cotton
ASTM D1776 Standard Practice for Conditioning and Testing Textiles
ASTM D2480 Test Method for Maturity Index and Linear Density of Cotton Fibers by the Causticaire Method
ASTM D7139 Standard Terminology for Cotton Fibers*, 2020-07-01 Update
ASTM D1442-06(2012) history
2019ASTM D1442-06(2019) Standard Test Method for Maturity of Cotton Fibers (Sodium Hydroxide Swelling and Polarized Light Procedures)
2012ASTM D1442-06(2012) Standard Test Method for Maturity of Cotton Fibers (Sodium Hydroxide Swelling and Polarized Light Procedures)
2006ASTM D1442-06 Standard Test Method for Maturity of Cotton Fibers (Sodium Hydroxide Swelling and Polarized Light Procedures)
2000ASTM D1442-00 Standard Test Method for Maturity of Cotton Fibers (Sodium Hydroxide Swelling and Polarized Light Procedures)
1993ASTM D1442-93 Standard Test Method for Maturity of Cotton Fibers (Sodium Hydroxide Swelling and Polarized Light Procedures)