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 (weight) and is 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 may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard.
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 and health practices and determine the applicability of regulatory limitations prior to use.

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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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.
Designation:D3776/D3776M–09a
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 (ϵ) indicates an editorial change since the last revision or reapproval.
1. Scope 3.1.1.1 Discussion—Fabric mass per unit area is expressed
either as grams per square metre (ounces per square yard), or
1.1 These test methods cover the measurement of fabric
grams per linear metre (ounces per linear yard). Fabric mass is
mass per unit area (weight) and is applicable to most fabrics.
also sometimes expressed inversely as linear metres per
1.2 There are four approved options:
kilograms (yards per pound) with the fabric width stated.
1.2.1 Option A—Full Piece, Roll, Bolt or Cut (Section 7).
3.2 For definitions of other textile terms used in these test
1.2.2 Option B—Full Width Sample (Section 8).
methods, refer to Terminology D123.
1.2.3 Option C—Small Swatch of Fabric (Section 9).
1.2.4 Option D—Narrow Fabrics (Section 10).
4. Summary of Test Methods
1.3 The values stated in either SI units or inch-pound units
4.1 Fabric mass is calculated from the mass of a specimen
are to be regarded separately as standard. The values stated in
the length and width of which have been measured as directed
each system may not be exact equivalents; therefore, each
in one of the procedures in Test Method D3773 and D3774.
system shall be used independently of the other. Combining
values from the two systems may result in non-conformance
5. Apparatus
with the standard.
5.1 Scale, with a capacity and sensitivity sufficient to weigh
1.4 This standard does not purport to address all of the
the full piece, roll, bolt, or cut units to within60.1 % of their
safety concerns, if any, associated with its use. It is the
gross mass. The accuracy of the scale should be certified by a
responsibility of the user of this standard to establish appro-
recognized authority.
priate safety and health practices and determine the applica-
5.2 Balance, having a capacity and sensitivity to weigh
bility of regulatory limitations prior to use.
within60.1 % of the mass of the specimens being tested.
2. Referenced Documents 5.3 Cutting Die, either square or round with an area of at
2 2
2 least 13 cm or 4 in.
2.1 ASTM Standards:
D123 Terminology Relating to Textiles
6. Conditioning
D1776 Practice for Conditioning and Testing Textiles
6.1 Condition test specimens as directed in Practice D1776.
D3773 Test Methods for Length of Woven Fabric
6.2 All weighing tests should be made in the standard
D3774 Test Method for Width of Textile Fabric
atmosphere for testing textiles (206 1°C (706 2°F),
2.2 Other Standard:
656 2 % RH), after the specimens have been conditioned in
3
ANSI/ASQC Z1.4 Inspection by Attributes
the same atmosphere. It may be impractical to condition the
specimens in Option A or nonconditioned testing may be
3. Terminology
agreed upon by the purchaser and supplier. When the full rolls
3.1 Definitions:
or bolts of fabric cannot be properly conditioned in a reason-
3.1.1 weight, n—as used with fabrics, mass per unit area.
able time with available facilities, perform the tests without
conditioning and report the actual conditions prevailing at the
1
These test methods are under the jurisdiction of ASTM Committee D13 on
time of the test. Such results may not correspond with the
Textiles and are the direct responsibility of Subcommittee D13.60 on Fabric Test
resultsobtainedaftertestingadequatelyconditionedspecimens
Methods, Specific.
in the standard atmosphere for testing textiles.
Current edition approved July 1, 2009. Published August 2009. Replaces
Sections 35 to 41 of Methods D1910 – 64 (1975). Originally approved in 1979. Last
7. OptionA—Full Piece, Roll, Bolt, or Cut
previous edition approved in 2009 as D3776 – 09. DOI: 10.1520/D3776_D3776M-
09A.
7.1 Significance and Use
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
7.1.1 OptionAforthedeterminationofmassperunitareaof
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Standards volume information, refer to the standard’s Document Summary page on
woven fabrics may be used for acceptance testing of commer-
the ASTM website.
cial shipments since it has been used extensively in the trade.
3
Available fromAmerican 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

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NOTICE: This standa
...

This document is not anASTM standard and is intended only to provide the user of anASTM 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:D3776–09 Designation:D3776/D3776M–09a
Standard Test Methods for
1
Mass Per Unit Area (Weight) of Fabric
This standard is issued under the fixed designation D 3776/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.
1. Scope
1.1 These test methods cover the measurement of fabric mass per unit area (weight) and is 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).
1.3The values either in SI units or U.S. customary units are regarded as standard. U.S. customary units may be approximate.
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 may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the
two systems may result in non-conformance with the standard.
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 and health practices and determine the applicability of regulatory
limitations prior to use.
2. Referenced Documents
2
2.1 ASTM Standards:
D 123 Terminology Relating to Textiles
D 1776 Practice for Conditioning and Testing Textiles
D 3773 Test Methods for Length of Woven Fabric
D 3774 Test Method for Width of Textile Fabric
2.2 Other Standard:
3
ANSI/ASQC Z1.4 Inspection by Attributes
3. Terminology
3.1 Definitions:
3.1.1 weight, n—as used with fabrics, mass per unit area.
3.1.1.1 Discussion—Fabric mass per unit area is expressed either as grams per square metre (ounces per square yard), or grams
per linear metre (ounces per linear yard). Fabric mass is also sometimes expressed inversely as linear metres per kilograms (yards
per pound) with the fabric width stated.
3.2 For definitions of other textile terms used in these test methods, refer to Terminology D 123.
4. Summary of Test Methods
4.1 Fabric mass is calculated from the mass of a specimen the length and width of which have been measured as directed in
one of the procedures in Test Method D 3773 and D3774 and D 3774.
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.
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 Jan. 15,July 1, 2009. Published FebruaryAugust 2009. Replaces Sections 35 to 41 of Methods D 1910 – 64 (1975). Originally approved in
D3776–79.1979. Last previous edition approved in 20072009 as D 3776 – 079.
2
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at service@astm.org. 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–09a
5.2 Balance, having a capacity and sensitivity to weigh within 60.1 % of the mass of the specimens being tested.
2 2
5.3 Cutting Die, either square or round with an area of at least 13 cm or 4 in.
6. Conditioning
6.1 Condition test specimens as directed in Practice D 1776.
6.2 All weighing tests should be made in the standard atmosphere for testing textiles (20 6 1°C (70 6 2°F), 65 6 2 % RH),
after the specimens have been conditioned in the same atmosphere. It may be impractical to condition the specimens in Option
A or nonconditioned testing may be agreed upon by the purchaser and supplier. When the full rolls or bolts of fabric cannot be
properly conditioned in a reasonable time with available facilities, perform the tests without conditioning and report the actual
condition
...

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