ASTM D3776/D3776M-20

Standard Test Methods for Mass Per Unit Area (Weight) of Fabric

ABSTRACT
These test methods cover the measurement of fabric mass per unit area (weight) and is applicable to most fabrics. There are four approved options in the measurement of fabric mass per unit area: Option A, Option B, Option C, and Option D. Option A may be used for acceptance testing of commercial shipments since it has been used extensively in the trade. The second option is Option B which is applicable to a full-width sample cut from a full piece, roll, bolt, or cut. Unless otherwise specified, these results will include selvages and will be on the basis of conditioned fabric. Option C on the other hand is applicable when a small swatch of fabric is sent to the laboratory to be used as the test specimen. The results are considered to be applicable to the sample only and not necessarily to the lot from which the sample was taken. Measurements by this method do not include selvages and should be reported as such, unless a selvage allowance is specified. The last option is Option D which is intended for use with narrow fabrics as so designated by the trade.
SCOPE
1.1 These test methods cover the measurement of fabric mass per unit area (traditionally referred to as “fabric weight”) and are applicable to most fabrics.  
1.2 There are four approved options:  
1.2.1 Option A—Full Piece, Roll, Bolt or Cut (Section 7).  
1.2.2 Option B—Full Width Sample (Section 8).  
1.2.3 Option C—Small Swatch of Fabric (Section 9).  
1.2.4 Option D—Narrow Fabrics (Section 10).  
1.3 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system are not necessarily exact equivalents; therefore, to ensure conformance with the standard, each system shall be used independently of the other, and values from the two systems shall not be combined.  
1.4 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

General Information

• Status: Published
• Publication Date: 30-Jun-2020
• ICS: 59.080.30 - Textile fabrics
• Technical Committee: D13 - Textiles
• Drafting Committee: D13.60 - Fabric Physical Test Methods B

Standards Content (Sample)

This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: D3776/D3776M − 20
Standard Test Methods for
1
Mass Per Unit Area (Weight) of Fabric
This standard is issued under the fixed designation D3776/D3776M; 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 U.S. Department of Defense.
1. Scope D3773 Test Methods for Length of Woven Fabric
D3774 Test Method for Width of Textile Fabric
1.1 These test methods cover the measurement of fabric
2.2 Other Standard:
mass per unit area (traditionally referred to as “fabric weight”)
3
ANSI/ASQC Z1.4 Inspection by Attributes
and are applicable to most fabrics.
1.2 There are four approved options:
3. Terminology
1.2.1 Option A—Full Piece, Roll, Bolt or Cut (Section 7).
3.1 The following terms are relevant to this standard: cut;
1.2.2 Option B—Full Width Sample (Section 8).
weight.
1.2.3 Option C—Small Swatch of Fabric (Section 9).
1.2.4 Option D—Narrow Fabrics (Section 10).
3.2 FordefinitionsofallothertextiletermsseeTerminology
D123.
1.3 The values stated in either SI units or inch-pound units
are to be regarded separately as standard. The values stated in
4. Summary of Test Methods
each system are not necessarily exact equivalents; therefore, to
ensure conformance with the standard, each system shall be 4.1 Fabric weight is calculated from the mass of a specimen
used independently of the other, and values from the two whichhasalsohadthelengthandwidth,ordiametermeasured.
systems shall not be combined.
5. Apparatus
1.4 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the 5.1 Balance, having an appropriate capacity and sensitivity
responsibility of the user of this standard to establish appro- to measure mass of the specimens being tested within 60.1 %
priate safety, health, and environmental practices and deter- of the true value.The balance should be verified and calibrated
mine the applicability of regulatory limitations prior to use. periodically.
1.5 This international standard was developed in accor-
5.2 Cutting Die, either square or round with an area of at
dance with internationally recognized principles on standard- 2 2
least 13 cm (2 in. ), for Option C.
ization established in the Decision on Principles for the
Development of International Standards, Guides and Recom-
6. Conditioning
mendations issued by the World Trade Organization Technical
6.1 Condition test specimens as directed in Practice D1776.
Barriers to Trade (TBT) Committee.
6.2 All tests should be made in the standard atmosphere for
2. Referenced Documents
testing textiles (21 6 2°C (70 6 4°F), 65 6 5 % RH), after the
2
specimens have been conditioned in the same atmosphere. It
2.1 ASTM Standards:
may be impractical to condition the specimens in Option A or
D123 Terminology Relating to Textiles
nonconditioned testing may be agreed upon by the purchaser
D1776 Practice for Conditioning and Testing Textiles
and supplier. When the full rolls or bolts of fabric cannot be
properly conditioned in a reasonable time with available
1
These test methods are under the jurisdiction of ASTM Committee D13 on
facilities, perform the tests without conditioning and report the
Textiles and are the direct responsibility of Subcommittee D13.60 on Fabric Test
actual conditions prevailing at the time of the test. Such results
Methods, Specific.
may not correspond with the results obtained after testing
Current edition approved July 1, 2020. Published August 2020. Replaces
Sections 35 to 41 of Methods D1910 – 64 (1975). Originally approved in 1979. Last adequately-conditioned specimens in the standard atmosphere
previous edition approved in 2017 as D3776 – 09a(2017). DOI: 10.1520/D3776_
for testing textiles.
D3776M-20.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
3
Standards volume information, refer to the standard’s Document Summary page on Available from American National Standards Institute (ANSI), 25 W. 43rd St.,
the ASTM website. 4th Floor, New York, NY 10036, http://www.ansi.org.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
D3776/D3776M − 20
7. Option A – Full Piece, Roll, Bolt, or Cut linear yard, or linear yards per pound to three significant
figures, unle
...

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: D3776/D3776M − 09a (Reapproved 2017) D3776/D3776M − 20
Standard Test Methods for
1
Mass Per Unit Area (Weight) of Fabric
This standard is issued under the fixed designation D3776/D3776M; 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 U.S. Department of Defense.
1. Scope
1.1 These test methods cover the measurement of fabric mass per unit area (weight) and is(traditionally referred to as “fabric
weight”) and are applicable to most fabrics.
1.2 There are four approved options:
1.2.1 Option A—Full Piece, Roll, Bolt or Cut (Section 7).
1.2.2 Option B—Full Width Sample (Section 8).
1.2.3 Option C—Small Swatch of Fabric (Section 9).
1.2.4 Option D—Narrow Fabrics (Section 10).
1.3 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each
system mayare not benecessarily exact equivalents; therefore, to ensure conformance with the standard, each system shall be used
independently of the other. Combiningother, and values from the two systems may result in non-conformance with the
standard.shall not be combined.
1.4 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 safety, health, and healthenvironmental practices and determine the
applicability of regulatory limitations prior to use.
1.5 This international standard was developed in accordance with internationally recognized principles on standardization
established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued
by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents
2
2.1 ASTM Standards:
D123 Terminology Relating to Textiles
D1776 Practice for Conditioning and Testing Textiles
D3773 Test Methods for Length of Woven Fabric
D3774 Test Method for Width of Textile Fabric
2.2 Other Standard:
3
ANSI/ASQC Z1.4 Inspection by Attributes
3. Terminology
3.1 The following terms are relevant to this standard: cut; weight.
3.2 For definitions of all other textile terms see Terminology D123.
4. Summary of Test Methods
4.1 Fabric massweight is calculated from the mass of a specimen which has also had the length and width of which have been
measured as directed in one of the procedures in Test Method width, or diameter measured.D3773 and D3774.
1
These test methods are under the jurisdiction of ASTM Committee D13 on Textiles and are the direct responsibility of Subcommittee D13.60 on Fabric Test Methods,
Specific.
Current edition approved July 15, 2017July 1, 2020. Published August 2017August 2020. Replaces Sections 35 to 41 of Methods D1910 – 64 (1975). Originally approved
in 1979. Last previous edition approved in 20132017 as D3776 – 09a(2013).(2017). DOI: 10.1520/D3776_D3776M-09AR17.10.1520/D3776_D3776M-20.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
3
Available from American National Standards Institute (ANSI), 25 W. 43rd St., 4th Floor, New York, NY 10036, http://www.ansi.org.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
D3776/D3776M − 20
5. Apparatus
5.1 Scale, with a capacity and sensitivity sufficient to weigh the full piece, roll, bolt, or cut units to within 60.1 % of their gross
mass. The accuracy of the scale should be certified by a recognized authority.
5.1 Balance, having a an appropriate capacity and sensitivity to weigh within 60.1 % of the measure mass of the specimens
being tested.tested within 60.1 % of the true value. The balance should be verified and calibrated periodically.
2 2
5.2 Cutting Die, either square or round with an area of at least 13 cm or 2 (2 in. ), for Option C.
6. Conditioning
6.1 Condition test specimens as directed in Practice D1776.
6.2 All weighing tests should be made in the standard atmosphere for testing textiles (21 6 1°C (70 6 2°F), 65 6 2 % RH),
(2
...