ASTM D1907-07
(Test Method)Standard Test Method for Linear Density of Yarn (Yarn Number) by the Skein Method
Standard Test Method for Linear Density of Yarn (Yarn Number) by the Skein Method
SCOPE
1.1 This test method covers the determination of the linear density of all types of yarn in package form, subject to the limitations of size and stretch given in and . Provision is made for expressing yarn linear density in all the traditional yarn numbering systems.
1.2 This method is applicable to yarns that stretch less than 5 % when tension on the yarn is increased from 0.25 to 0.75 cN/tex (0.25 to 0.75 gf/tex). By mutual agreement, and use of a lower than specified reeling tension, this method may also be adapted to measure the linear density of yarns that stretch more than 5 %, under the above force.
1.3 This method is applicable to yarns finer than 2000 tex. However, it may be also adapted to coarser yarns by the use of skeins of shorter than specified lengths, and alternate reeling conditions, agreeable to the interested parties.
1.4 Depending on the procedure used to calculate the moisture content of the yarn being tested, and its actual moisture content, or finish content, or both, one or more of the following options may be utilized.
1.4.1 Unscoured YarnOption 1-Yarn at equilibrium with the standard atmosphere for testing textiles.
Option 2-Oven-dried yarn.
Option 3-Oven-dried yarn, plus commercial moisture regain.
1.4.2 Scoured YarnOption 4-Scoured yarn at equilibrium with the standard atmosphere for testing textiles.
Option 5-Oven-dried, scoured yarn.
Option 6-Oven-dried, scoured yarn, plus commercial moisture regain.
Option 7-Oven-dried, scoured yarn, plus commercial allowance (commercial moisture regain, plus an allowance for finish).
1.5 Specimens used to determine yarn linear density may also be used to determine the skein breaking strength of the yarn. Hence, this method provides the sequence of steps to be followed, to determine both these yarn properties. Note 1The linear density of yarns produced with jute, or glass, may also be determined by the following approved methods: Specifications D 541, D 578, and D 681. The linear density of short yarn segments, raveled from fabrics, may be determined by Test Method D 1059.
1.6 The values stated in SI units are to be regarded as standard. The values shown in parentheses are approximate conversions to U.S. customary unit equivalents.
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.
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Standards Content (Sample)
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Designation:D1907–07
Standard Test Method for
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Linear Density of Yarn (Yarn Number) by the Skein Method
This standard is issued under the fixed designation D1907; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope 1.5 Specimens used to determine yarn linear density may
also be used to determine the skein breaking strength of the
1.1 This test method covers the determination of the linear
yarn. Hence, this method provides the sequence of steps to be
density of all types of yarn in package form, subject to the
followed, to determine both these yarn properties.
limitations of size and stretch given in 1.2 and 1.3. Provision is
made for expressing yarn linear density in all the traditional
NOTE 1—The linear density of yarns produced with jute, or glass, may
yarn numbering systems.
also be determined by the following approved methods: Specifications
D541,D578,andD681.Thelineardensityofshortyarnsegments,raveled
1.2 This method is applicable to yarns that stretch less than
from fabrics, may be determined by Test Method D1059.
5 % when tension on the yarn is increased from 0.25 to 0.75
cN/tex (0.25 to 0.75 gf/tex). By mutual agreement, and use of
1.6 The values stated in SI units are to be regarded as
a lower than specified reeling tension, this method may also be
standard. The values shown in parentheses are approximate
adaptedtomeasurethelineardensityofyarnsthatstretchmore
conversions to U.S. customary unit equivalents.
than 5 %, under the above force.
1.7 This standard does not purport to address all of the
1.3 This method is applicable to yarns finer than 2000 tex.
safety concerns, if any, associated with its use. It is the
However, it may be also adapted to coarser yarns by the use of
responsibility of the user of this standard to establish appro-
skeins of shorter than specified lengths, and alternate reeling
priate safety and health practices and determine the applica-
conditions, agreeable to the interested parties.
bility of regulatory limitations prior to use.
1.4 Depending on the procedure used to calculate the
2. Referenced Documents
moisture content of the yarn being tested, and its actual
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moisture content, or finish content, or both, one or more of the 2.1 ASTM Standards:
following options may be utilized. D123 Terminology Relating to Textiles
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1.4.1 Unscoured Yarn:
D541 Specification for Single Jute Yarn
Option1—Yarn at equilibrium with the standard atmosphere D578 Specification for Glass Fiber Strands
for testing textiles.
D681 Specification for Jute Rove and Plied Yarn for Elec-
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Option 2—Oven-dried yarn. trical and Packing Purposes
Option 3—Oven-dried yarn, plus commercial moisture re-
D1059 Test Method for Yarn Number Based on Short-
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gain. Length Specimens
1.4.2 Scoured Yarn:
D1578 Test Method for Breaking Strength of Yarn in Skein
Option 4—Scoured yarn at equilibrium with the standard Form
atmosphere for testing textiles.
D1909 StandardTable of Commercial Moisture Regains for
Option 5—Oven-dried, scoured yarn. Textile Fibers
Option6—Oven-dried,scouredyarn,pluscommercialmois-
D2257 Test Method for Extractable Matter in Textiles
ture regain. D2260 Tables of Conversion Factors and Equivalent Yarn
Option 7—Oven-dried, scoured yarn, plus commercial al-
Numbers Measured in Various Numbering Systems
lowance (commercial moisture regain, plus an allowance for D2258 Practice for Sampling Yarn for Testing
finish).
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For referenced ASTM standards, visit the ASTM website, www.astm.org, or
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This test method is under the jurisdiction ofASTM Committee D13 onTextiles contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
and is the direct responsibility of Subcommittee D13.58 on Yarns and Fibers. Standards volume information, refer to the standard’s Document Summary page on
Current edition approved Jan. 1, 2007. Published February 2007. Originally the ASTM website.
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approved in 1961 T. Last previous edition approved in 2001 as D1907 – 01. DOI: Withdrawn. The last approved version of this historical standard is referenced
10.1520/D1907-07. on www.astm.org.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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D1907–07
D2494 Test Method for Commercial Mass of a Shipment of moisture regain, or allowance are generally used for filament
Yarn or Manufactured Staple Fiber or Tow yarns, or yarns containing wool fibers. The specific options to
D4849 Terminology Related to Yarns and Fibers
...
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