EUROLAB laboratory provides testing and compliance services within the scope of ASTM D1907 standard. The ASTM D1907 standard covers the determination of the linear density of all types of yarn in bundle form, subject to size and stretch limitations. In all conventional yarn numbering systems, preparation is made to express the yarn linear density.
-icin-standart-test-yontemi.jpg "ASTM D1907 Standard Test Method for Linear Density (Yarn Number) of Yarn by Hank Method")
This test method is applicable to yarns that stretch less than 0,25% when the tension on the yarn is increased from 0,75 to 0,25 cN/tex [0,75 to 5 gf/tex]. By mutual agreement and using a lower winding tension than specified, this method can also be adapted to measure the linear density of yarns that stretch more than 5% under the above force.
This method can be applied to yarns finer than 2000 tex. However, it can also be adapted to coarser yarns using hanks shorter than the specified lengths and alternative winding conditions acceptable to the parties involved.
Depending on the procedure used to calculate the moisture content and the actual moisture content or the finish content, or both, of the yarn under test, one or more of the following options may be used.
Uncleaned Thread
Washed Yarn
Samples used to determine the yarn linear density can also be used to determine the hank breaking strength of the yarn. This method therefore provides the sequence of steps to follow to determine both yarn properties.
Values stated in SI units or inch-pound units will be considered standard separately. The values specified in each system may not be exactly equivalent; therefore, each system should be used independently of the other. Combining values from the two systems may result in non-compliance with the standard.
This standard does not purport to address all, if any, safety concerns associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health and environmental practices and to determine the applicability of regulatory restrictions prior to use.
Our organization, EUROLAB, provides standard test method services for linear density of yarn (yarn number) by hank method, within the framework of national and international standards, with its trained and expert staff and advanced technological equipment, among numerous test, measurement, analysis and evaluation studies. Contact EUROLAB to get testing service under ASTM D1907 standard.
To get an appointment, to get more detailed information or to request an evaluation, you can ask us to fill in our form and reach you.
EUROLABreporting and certification activities, United Accreditation Foundation (UAF), Turkish Accreditation Agency (TÜRKAK) ve Enterprise Accreditation Foundation (EAF) based on the accreditation provided by the accreditation body. The Enterprise Accreditation Foundation (EAF) accreditation body is also a signatory of the United Nations (UN GLOBAL COMPACT) organization.
