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March/April 2008

ASTM Introduces Proficiency Testing for Textiles

spools of yarnThe ASTM Proficiency Testing Program has just expanded its existing Textiles Proficiency Testing Program to include a new proficiency testing program on yarns and threads. This new PTP is an industry–driven quality assurance program for companies doing yarn and thread component performance evaluations on a routine basis. This PTP will provide participants with a statistical tool that will enable them to compare, improve and maintain a high level of performance in the use of ASTM test methods with other laboratories worldwide.

The test parameters in the ASTM yarn and thread PTP include the following ASTM standard tests:

  • D 1422, Test Method for Twist in Single Spun Yarns by the Untwist-Retwist Method;
  • D 1423, Test Method for Twist in Yarns by Direct-Counting;
  • D 1907, Test Method for Linear Density of Yarn (Yarn Number) by the Skein Method; and
  • D 2256, Test Method for Tensile Properties of Yarns by the Single-strand Method (straight break strength and loop strength).

For each test trial, laboratory participants receive a different spool containing 500 yards of a representative yarn or thread for testing, along with interactive electronic data report forms and test instructions. Using the specified ASTM program tests, participating laboratories conduct the tests of their choice that they routinely run. Upon the completion of testing, each lab electronically submits their data to the ASTM PTP Center for use in generating statistical summary reports. Final reports, which are electronically distributed within a month of the data submission deadline, contain:

  • All test results, coded to maintain PTP customer confidentiality;
  • Statistical analysis of test data; and
  • Charts plotting test results versus laboratory code.

Test results received through the program will allow laboratories to monitor strengths and weaknesses to maintain accreditation status and compare test results and calculated statistical parameters with labs throughout the world. Test cycles will be held in June and December. Companies must be registered by April 30 to be included in the June test trial. For more information on registration and fees, please contact Helen Mahy at ASTM headquarters or visit the proficiency test program for textiles section of ASTM International’s Web site by clicking here.


ASTM Staff: Helen Mahy

Phone: 610/832-9683