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.

General Information

Status
Historical
Publication Date
30-Jun-2009
Technical Committee
Current Stage
Ref Project

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ASTM D3776/D3776M-09ae2 - Standard Test Methods for Mass Per Unit Area (Weight) of Fabric
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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Designation: D3776/D3776M − 09a
StandardTest 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 Department of Defense.
1 2 2
ε NOTE—The last line of 5.3 was corrected editorially from “.or 4 in. ” to “.or 2 in. ” in April 2011.
2
ε NOTE—The standard atmosphere for testing textiles was corrected to 21°C in 6.2 and the Terminology section was up-
dated editorially in September 2011.
1. Scope 2.2 Other Standard:
3
ANSI/ASQC Z1.4 Inspection by Attributes
1.1 These test methods cover the measurement of fabric
mass per unit area (weight) and is applicable to most fabrics.
3. Terminology
1.2 There are four approved options:
3.1 The following terms are relevant to this standard:
1.2.1 Option A—Full Piece, Roll, Bolt or Cut (Section 7).
weight.
1.2.2 Option B—Full Width Sample (Section 8).
3.2 FordefinitionsofallothertextiletermsseeTerminology
1.2.3 Option C—Small Swatch of Fabric (Section 9).
D123.
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 within 60.1 % 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.
within 60.1 % 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 2 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
D3774 Test Method for Width of Textile Fabric
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), after the specimens have been conditioned in
the same atmosphere. It may be impractical to condition the
1
These test methods are under the jurisdiction of ASTM Committee D13 on
specimens in Option A or nonconditioned testing may be
Textiles and are the direct responsibility of Subcommittee D13.60 on Fabric Test
Methods, Specific.
agreed upon by the purchaser and supplier. When the full rolls
Current edition approved July 1, 2009. Published August 2009. Replaces
or bolts of fabric cannot be properly conditioned in a reason-
Sections 35 to 41 of Methods D1910 – 64 (1975). Originally approved in 1979. Last
able time with available facilities, perform the tests without
previous edition approved in 2009 as D3776 – 09. DOI: 10.1520/D3776_D3776M-
09AE02. conditioning and report the actual conditions prevailing at the
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
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
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D3776/D3776M − 09a
time of the test. Such results may not correspond with the 7.4.3 Calculate the mass per unit area, mass per linear yard,
results obtained after testing adequately conditioned specimens or linear yards per pound to three significant figures, unless
in the standard atmosphere for testing textiles. otherwisespecified,usingEq4,Eq5,Eq6,orEq7,asfollows:
Mass per unit area:
7. Option A—Full Piece, Roll
...

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