ASTM D3775-07
(Test Method)Standard Test Method for Warp (End) and Filling (Pick) Count of Woven Fabrics
Standard Test Method for Warp (End) and Filling (Pick) Count of Woven Fabrics
SIGNIFICANCE AND USE
This test method is considered satisfactory for acceptance testing of commercial shipments because it has been used extensively in the trade for that purpose.
5.1.1 If there are differences of practical significance between reported test results for two laboratories (or more), comparative test should be performed to determine if there is a statistical bias between them, using competent statistical assistance. As a minimum, use the samples for such a comparative test that are as homogeneous as possible, drawn from the same lot of material as the samples that resulted in disparate results during initial testing and randomly assigned in equal numbers to each laboratory. The test results from the laboratories involved should be compared using a statistical test for unpaired data, a probability level chosen prior to the testing series. If bias is found, either its cause must be found and corrected, or future test results for that material must be adjusted in consideration of the known bias.
SCOPE
1.1 This test method covers the measurement of warp end count and filling pick count and is applicable to all types of woven fabrics.Note 1
Historically, the term fabric count has been used to describe the end and pick count of woven fabrics. The terms warp (end) and filling (pick) count are replacing the term fabric count, to provide clarity.
1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
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.
General Information
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Standards Content (Sample)
NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Please contact ASTM International (www.astm.org) for the latest information.
Designation:D 3775–07
Standard Test Method for
1
Warp (End) and Filling (Pick) Count of Woven Fabrics
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 (ϵ) indicates an editorial change since the last revision or reapproval.
1. Scope 3.1.1 For definitions of textile terms used in this test
method; count, end, end count, filling, pick, pick count, and
1.1 This test method covers the measurement of warp end
thread count, refer to Terminology D 4850D4850.
count and filling pick count and is applicable to all types of
3.1.2 For definition of the term thread count, refer to
woven fabrics.
Terminology D 7023.D7023
NOTE 1—Historically, the term fabric count has been used to describe
3.1.3 Forothertextiletermsusedinthistestmethod,referto
the end and pick count of woven fabrics. The terms warp (end) and filling
Terminology D 123D123.
(pick) count are replacing the term fabric count, to provide clarity.
4. Summary of Test Method
1.2 The values stated in SI units are to be regarded as the
standard. The values given in parentheses are for information
4.1 The number of warp yarns (ends) per unit distance and
only.
filling yarns (picks) per unit distance are determined using
1.3 This standard does not purport to address all of the
suitable magnifying and counting devices or by raveling yarns
safety concerns, if any, associated with its use. It is the
from fabrics. See ANSI Z1.4.
responsibility of the user of this standard to establish appro-
5. Significance and Use
priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use.
5.1 This test method is considered satisfactory for accep-
tancetestingofcommercialshipmentsbecauseithasbeenused
2. Referenced Documents
extensively in the trade for that purpose.
2
2.1 ASTM Standards:
5.1.1 If there are differences of practical significance be-
D123 Terminology Relating to Textiles
tween reported test results for two laboratories (or more),
D1776 Practice for Conditioning and Testing Textiles
comparative test should be performed to determine if there is a
D4850 Terminology Relating to Fabrics and Fabric Test
statistical bias between them, using competent statistical assis-
Methods
tance. As a minimum, use the samples for such a comparative
D7023 Terminology Relating to Home Furnishings
test that are as homogeneous as possible, drawn from the same
2.2 Other Standard:
lot of material as the samples that resulted in disparate results
3
ANSI/ASQC Z1.4—Inspection by Attributes
during initial testing and randomly assigned in equal numbers
to each laboratory. The test results from the laboratories
3. Terminology
involved should be compared using a statistical test for
3.1 Definitions:
unpaired data, a probability level chosen prior to the testing
series. If bias is found, either its cause must be found and
1 corrected, or future test results for that material must be
This test method is under the jurisdiction of ASTM Committee D13 on Fabric
Test Methods, Specific adjusted in consideration of the known bias.
Current edition approved Aug. 1, 2007. Published October 2007. Replaces
Sections 28 to 34 of Methods D 1910 – 64 (1975). Originally approved in 1979 as
6. Apparatus
D 3775 – 79. Last previous edition approved in 2003 as D 3775 – 03a.
2
6.1 Use any suitable device, such as pick glass, rule and
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM pointer, microfilm reader, or projection equipment.
Standards volume information, refer tot he standard’s Document Summary page on 1
6.2 Use a scale graduated in mm ( ⁄16 in.) to measure the
the ASTM website.
width of the fabric test specimen to be raveled for a count of
3
Available from American National Standards Institute, 11 W. 42nd St., 13th
yarns.
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.
Please contact ASTM International (www.astm.org) for the latest information.
D 3775–07
7. Sampling 9.3 Specific Fabric Counts
9.3.1 For fabrics containing less than 1 yarn per mm (25
7.1 Lot Sample—As a lot sample for acceptance testing,
yarns per in), count the number of warp yarns (ends) over a 75
take at random the number of rolls of fabric as directed in an
mm (3 in.) width, in five randomly selected places across the
applicable material specification or other agreement betw
...
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