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
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ASTM D3776/D3776M-09ae1 - Standard Test Methods for Mass Per Unit Area (Weight) of Fabric
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Designation:D3776/D3776M–09a
Standard Test Methods for
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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.
1 2 2
´ NOTE—The last line of 5.3 was corrected editorially from “.or 4 in. ” to “.or 2 in. ” in April 2011.
1. Scope 3. Terminology
1.1 These test methods cover the measurement of fabric 3.1 Definitions:
mass per unit area (weight) and is applicable to most fabrics. 3.1.1 weight, n—as used with fabrics, mass per unit area.
1.2 There are four approved options: 3.1.1.1 Discussion—Fabric mass per unit area is expressed
1.2.1 Option A—Full Piece, Roll, Bolt or Cut (Section 7). either as grams per square metre (ounces per square yard), or
1.2.2 Option B—Full Width Sample (Section 8). grams per linear metre (ounces per linear yard). Fabric mass is
1.2.3 Option C—Small Swatch of Fabric (Section 9). also sometimes expressed inversely as linear metres per
1.2.4 Option D—Narrow Fabrics (Section 10). kilograms (yards per pound) with the fabric width stated.
1.3 The values stated in either SI units or inch-pound units 3.2 For definitions of other textile terms used in these test
are to be regarded separately as standard. The values stated in methods, refer to Terminology D123.
each system may not be exact equivalents; therefore, each
4. Summary of Test Methods
system shall be used independently of the other. Combining
4.1 Fabric mass is calculated from the mass of a specimen
values from the two systems may result in non-conformance
with the standard. the length and width of which have been measured as directed
in one of the procedures in Test Method D3773 and D3774.
1.4 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
5. Apparatus
responsibility of the user of this standard to establish appro-
5.1 Scale, with a capacity and sensitivity sufficient to weigh
priate safety and health practices and determine the applica-
the full piece, roll, bolt, or cut units to within 60.1 % of their
bility of regulatory limitations prior to use.
gross mass. The accuracy of the scale should be certified by a
2. Referenced Documents
recognized authority.
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2.1 ASTM Standards: 5.2 Balance, having a capacity and sensitivity to weigh
within 60.1 % of the mass of the specimens being tested.
D123 Terminology Relating to Textiles
D1776 Practice for Conditioning and Testing Textiles 5.3 Cutting Die, either square or round with an area of at
2 2
least 13 cm or 2 in.
D3773 Test Methods for Length of Woven Fabric
D3774 Test Method for Width of Textile Fabric
6. Conditioning
2.2 Other Standard:
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6.1 Condition test specimens as directed in Practice D1776.
ANSI/ASQC Z1.4 Inspection by Attributes
6.2 All weighing tests should be made in the standard
atmosphere for testing textiles (20 6 1°C (70 6 2°F),
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These test methods are under the jurisdiction of ASTM Committee D13 on
65 6 2 % RH), after the specimens have been conditioned in
Textiles and are the direct responsibility of Subcommittee D13.60 on Fabric Test
the same atmosphere. It may be impractical to condition the
Methods, Specific.
Current edition approved July 1, 2009. Published August 2009. Replaces
specimens in Option A or nonconditioned testing may be
Sections 35 to 41 of Methods D1910 – 64 (1975). Originally approved in 1979. Last
agreed upon by the purchaser and supplier. When the full rolls
previous edition approved in 2009 as D3776 – 09. DOI: 10.1520/D3776_D3776M-
or bolts of fabric cannot be properly conditioned in a reason-
09A.
2
able time with available facilities, perform the tests without
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
conditioning and report the actual conditions prevailing at the
Standards volume information, refer to the standard’s Document Summary page on
time of the test. Such results may not correspond with the
the ASTM website.
3
results obtained after testing adequately conditioned specimens
Available fromAmerican National Standards Institute (ANSI), 25 W. 43rd St.,
4th Floor, New York, NY 10036, http://www.ansi.org. in the standard atmosphere for testing textiles.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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D3776/D3776M–09a
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7. OptionA—Full Piece, Roll, Bolt, or Cut
oz/yd 5 576M/LW (4)
7.1 Significance and Use
Mass per yard:
7.1.1 OptionAforthe
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