ASTM D3775-02

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn. Contact ASTM
International (www.astm.org) for the latest information.
Designation:D3775–02
Standard Test Method for
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Fabric Count of Woven Fabric
This standard is issued under the fixed designation D3775; 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 (e) indicates an editorial change since the last revision or reapproval.
1. Scope 5. Significance and Use
1.1 Thistestmethodcoversthemeasurementoffabriccount 5.1 This test method is considered satisfactory for accep-
and is applicable to all types of woven fabrics. tance testing of commercial shipments because of prior exten-
1.2 The values stated in SI units are to be regarded as the sive use.
standard. The values given in parentheses are for information 5.1.1 If there are differences of practical significance be-
only. tween reported test results for two laboratories (or more),
1.3 This standard does not purport to address all of the comparative test should be performed to determine if there is a
safety concerns, if any, associated with its use. It is the statistical bias between them, using competent statistical assis-
responsibility of the user of this standard to establish appro- tance. As a minimum, use the samples for such a comparative
priate safety and health practices and determine the applica- test that are as homogeneous as possible, drawn from the same
bility of regulatory limitations prior to use. lot of material as the samples that resulted in disparate results
during initial testing and randomly assigned in equal numbers
2. Referenced Documents
to each laboratory. The test results from the laboratories
2.1 ASTM Standards: involved should be compared using a statistical test for
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D 123 Terminology Relating to Textiles
unpaired data, a probability level chosen prior to the testing
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D 1776 Practice for Conditioning and Testing Textiles series. If bias is found, either its cause must be found and
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D 4850 Terminology Relating to Fabric
corrected, or future test results for that material must be
2.2 Other Standard: adjusted in consideration of the known bias.
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ANSI/ASQC Z1.4—Inspection by Attributes
6. Apparatus
3. Terminology
6.1 Use any suitable device, such as pick glass, rule and
3.1 Definitions: pointer, microfilm reader, or projection equipment.
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3.1.1 For definitions of textile terms used in this test
6.2 Use a scale graduated in mm ( ⁄16 in.) to measure the
method, refer to Terminology D 4850. For other textile terms length of fabric to be ravelled for a count of yarns.
used in this test method, refer to Terminology D 123.
7. Sampling
4. Summary of Test Method
7.1 Lot Sample—As a lot sample for acceptance testing,
4.1 The number of warp yarns (ends) per unit distance and
take at random the number of rolls of fabric as directed in an
filling yarns (picks) per unit distance are determined using applicable material specification or other agreement between
suitable magnifying and counting devices or by raveling yarns
thepurchaserandthesupplier.Considerrollsoffabrictobethe
from fabrics. primary sampling units.
7.2 Laboratory Sample—As a laboratory sample, take a full
width swatch at least2m(2yd) long from each roll of fabric
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This test method is under the jurisdiction ofASTM Committee D13 onTextiles
in the lot sample. Consider each point at which fabric counts
and is the direct responsibility of Subcommittee D 13.60 on Fabric Test Methods,
are made as a test specimen.
Specific.
Current edition approved Sept. 10, 2002. Published November 2002. Replaces
NOTE 1—For specimens not obtained as directed in Section 7, the
Sections 28 to 34 of Methods D 1910 – 64 (1975). Originally published as
results should not be used for acceptance testing of a lot.
D 3775 – 79. Last previous edition D 3775 – 96.
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Annual Book of ASTM Standards, Vol 07.01.
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8. Conditioning
Annual Book of ASTM Standards, Vol 07.02.
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Available from American National Standards Institute, 11 W. 42nd St., 13th
8.1 Condition specimens as directed in Practice D 1776.
Floor, New York, NY 10036.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn. Contact ASTM
International (www.astm.org) for the latest information.
D3775–02
8.2 Fabrics woven from yarns having a relatively low in five different random places along the length of the
moisture regain in the standard atmosphere for testing textiles, laboratory sampling unit (see 9.1.1 and 9.1.2).
which is 21° 6 1 C (70° 6 2 F) and 65 % relative humidity, 9.4 Count by Raveling Options—For fabrics in which indi-
and which are not significantly affected by minor vari
...