ASTM D3775-98
(Test Method)Standard Test Method for Fabric Count of Woven Fabric
Standard Test Method for Fabric Count of Woven Fabric
SCOPE
1.1 This test method covers the measurement of fabric count and is applicable to all types of woven fabrics.
1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
1.3 This standard does not purport to address 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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Designation: D 3775 – 98
Standard Test Method for
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Fabric Count of Woven Fabric
This standard is issued under the fixed designation D 3775; 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 tance testing of commercial shipments because of prior exten-
sive use.
1.1 This test method covers the measurement of fabric count
5.1.1 In case of a dispute arising from differences in
and is applicable to all types of woven fabrics.
reported test values when using Test Method D 3775 for
1.2 The values stated in SI units are to be regarded as the
acceptance testing of commercial shipments, the purchaser and
standard. The values given in parentheses are for information
the supplier should conduct comparative tests to determine if
only.
there is a statistical bias between their laboratories. Competent
1.3 This standard does not purport to address all of the
statistical assistance is recommended for the investigation of
safety concerns, if any, associated with its use. It is the
bias. As a minimum, the two parties should take a group of test
responsibility of the user of this standard to establish appro-
specimens which are as homogeneous as possible and which
priate safety and health practices and determine the applica-
are from a lot of material of the type in question. The test
bility of regulatory limitations prior to use.
specimens should then be randomly assigned in equal numbers
2. Referenced Documents
to each laboratory for testing. The average results from the two
laboratories should be compared using appropriate statistical
2.1 ASTM Standards:
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analysis for unpaired data and an acceptable probability level
D 123 Terminology Relating to Textiles
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chosen by the two parties before testing is begun. If a bias is
D 1776 Practice for Conditioning Textiles for Testing
found, either its cause must be found and corrected or the
2.2 Other Standard:
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purchaser and the supplier must agree to interpret future test
ANSI/ASQC Z1.4—Inspection by Attributes
results with consideration of the known bias.
3. Terminology
6. Apparatus
3.1 Definitions:
6.1 Use any suitable device, such as pick glass, rule and
3.1.1 count, n—in woven textiles, the number of warp yarns
pointer, microfilm reader, or projection equipment.
(ends) and filling yarns (picks) per unit distance as counted
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6.2 Use a scale graduated in mm ( ⁄16 in.) to measure the
while the fabric is held under zero tension, and is free of folds
length of fabric to be ravelled for a count of yarns.
and wrinkles.
3.1.2 For definitions of other textile terms used in this test
7. Sampling
method, refer to Terminology D 123.
7.1 Lot Sample—As a lot sample for acceptance testing,
4. Summary of Test Method take at random the number of rolls of fabric as directed in an
applicable material specification or other agreement between
4.1 The number of warp yarns (ends) per unit distance and
the purchaser and the supplier. Consider rolls of fabric to be the
filling yarns (picks) per unit distance are determined using
primary sampling units.
suitable magnifying and counting devices or by raveling yarns
7.2 Laboratory Sample—As a laboratory sample, take a full
from fabrics.
width swatch at least2m(2yd) long from each roll of fabric
5. Significance and Use
in the lot sample. Consider each point at which fabric counts
are made as a test specimen.
5.1 This test method is considered satisfactory for accep-
NOTE 1—For specimens not obtained as directed in Section 7, the
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results should not be used for acceptance testing of a lot.
This test method is under the jurisdiction of ASTM Committee D-13 on Textiles
and is the direct responsibility of Subcommittee D 13.60 on Fabric Test Methods,
8. Conditioning
Specific.
Current edition approved Nov. 11, 1998. Published February 1999. Replaces
8.1 Condition specimens as directed in Practice D 1776.
Sections 28 to 34 of Methods D 1910 – 64 (1975). Originally published as
8.2 Fabrics woven from yarns having a relatively low
D 3775 – 79. Last previous edition D 3775 – 96.
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Annual Book of ASTM Standards, Vol 07.01.
moisture regain in the standard atmosphere for testing textiles,
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Available from American National Standards Institute, 11 W. 42nd St., 13th
which is 21° 6 1 C (70° 6 2 F) and 65 % relative humidity,
Floor, New York, NY 10036.
Copyright © ASTM, 100 Barr Harbor Drive, 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 discontinued.
Contact ASTM International (www.astm.org) for the latest inform
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