ASTM D3775-12
(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
5.1 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.
5.1.2 This test method is suitable for use with narrow fabrics when the count across the total width is measured in the narrow direction and extrapolated to the number of yarns per centimetre or inch.
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.
1.3 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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Designation: D3775 − 12
Standard Test Method for
1
Warp (End) and Filling (Pick) Count of Woven Fabrics
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 (´) 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 3.2 For all terminology related to Home Furnishings, refer
to Terminology D7023.
1.1 This test method covers the measurement of warp end
count and filling pick count and is applicable to all types of 3.3 For all other terms related to textiles, refer to Terminol-
woven fabrics. ogy D123.
NOTE 1—Historically, the term fabric count has been used to describe
4. Summary of Test Method
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. 4.1 The number of warp yarns (ends) per unit distance and
filling yarns (picks) per unit distance are determined using
1.2 The values stated in SI units are to be regarded as the
suitable magnifying and counting devices or by raveling yarns
standard. The values given in parentheses are for information
from fabrics. See ANSI Z1.4.
only.
1.3 This standard does not purport to address all of the
5. Significance and Use
safety concerns, if any, associated with its use. It is the
5.1 This test method is considered satisfactory for accep-
responsibility of the user of this standard to establish appro-
tancetestingofcommercialshipmentsbecauseithasbeenused
priate safety and health practices and determine the applica-
extensively in the trade for that purpose.
bility of regulatory limitations prior to use.
5.1.1 If there are differences of practical significance be-
tween reported test results for two laboratories (or more),
2. Referenced Documents
comparative test should be performed to determine if there is a
2
2.1 ASTM Standards:
statistical bias between them, using competent statistical assis-
D123 Terminology Relating to Textiles
tance. As a minimum, use the samples for such a comparative
D1776 Practice for Conditioning and Testing Textiles
test that are as homogeneous as possible, drawn from the same
D4850 Terminology Relating to Fabrics and Fabric Test
lot of material as the samples that resulted in disparate results
Methods
during initial testing and randomly assigned in equal numbers
D7023 Terminology Relating to Home Furnishings
to each laboratory. The test results from the laboratories
2.2 Other Standard:
3 involved should be compared using a statistical test for
ANSI/ASQC Z1.4—Inspection by Attributes
unpaired data, a probability level chosen prior to the testing
3. Terminology series. If bias is found, either its cause must be found and
corrected, or future test results for that material must be
3.1 For all terminology related to D13.59, Fabric Test
adjusted in consideration of the known bias.
Methods, General, refer to Terminology D4850
5.1.2 Thistestmethodissuitableforusewithnarrowfabrics
3.1.1 The following terms are relevant to this standard:
whenthecountacrossthetotalwidthismeasuredinthenarrow
count, end, end count, filling, pick, pick count, thread count.
direction and extrapolated to the number of yarns per centime-
thread count
tre or inch.
1
This test method is under the jurisdiction of ASTM Committee D13 on Fabric
6. Apparatus
Test Methods, Specific
6.1 Use any suitable device, such as pick glass, rule and
Current edition approved Sept. 1, 2012. Published October 2012. Replaces
Sections 28 to 34 of Methods D1910 – 64 (1975). Originally approved in 1979. Last
pointer, microfilm reader, or projection equipment. The use of
previous edition approved in 2008 as D3775 – 08. DOI: 10.1520/D3775-12.
optical sensing equipment may be used as agreed upon by the
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
purchaser and supplier.
contactASTM Customer Service at service@astm.org. ForAnnual Book of ASTM
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.
3 width of the fabric test specimen to be raveled for a count of
Available from American National Standards Institute, 11 W. 42nd St., 13th
Floor, New York, NY 10036. yarns.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
D3775 − 12
7. Sampling 9.2.3 For narrow fabrics constructed with widths of 25 mm
(1 in.) or less, count all of the yarns in the width of the fabric.
7.1 Lot Sample—As a
...
This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: D3775 − 08 D3775 − 12
Standard Test Method for
1
Warp (End) and Filling (Pick) Count of Woven Fabrics
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 (´) 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
1.1 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.
1.3 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.
2. Referenced Documents
2
2.1 ASTM Standards:
D123 Terminology Relating to Textiles
D1776 Practice for Conditioning and Testing Textiles
D4850 Terminology Relating to Fabrics and Fabric Test Methods
D7023 Terminology Relating to Home Furnishings
2.2 Other Standard:
3
ANSI/ASQC Z1.4—Inspection by Attributes
3. Terminology
3.1 For all terminology related to D13.59, Fabric Test Methods, General, refer to Terminology D4850
3.1.1 The following terms are relevant to this standard: count, end, end count, filling, pick, pick count, thread count. thread count
3.2 For all terminology related to Home Furnishings, refer to Terminology D7023.
3.3 For all other terms related to textiles, refer to Terminology D123.
4. Summary of Test Method
4.1 The number of warp yarns (ends) per unit distance and filling yarns (picks) per unit distance are determined using suitable
magnifying and counting devices or by raveling yarns from fabrics. See ANSI Z1.4.
5. Significance and Use
5.1 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
1
This test method is under the jurisdiction of ASTM Committee D13 on Fabric Test Methods, Specific
Current edition approved July 1, 2008Sept. 1, 2012. Published July 2008 October 2012. Replaces Sections 28 to 34 of Methods D1910 – 64 (1975). Originally approved
in 1979 as 1979. D3775 – 79.Last previous edition approved in 20072008 as D3775 – 07a.D3775 – 08. DOI: 10.1520/D3775-08.10.1520/D3775-12.
2
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 Standards
volume information, refer tot he standard’s Document Summary page on the ASTM website.
3
Available from American National Standards Institute, 11 W. 42nd St., 13th Floor, New York, NY 10036.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
D3775 − 12
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.
5.1.2 This test method is suitable for use with narrow fabrics when the count across the total width is measured in the narrow
direction and extrapolated to the number of yarns per centimetre or inch.
6. Apparatus
6.1 Use any suitable device, such as pick glass, rule and pointer, microfilm reader, or projection equipment. T
...
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