ASTM D3773-90(2002)
(Test Method)Standard Test Methods for Length of Woven Fabric
Standard Test Methods for Length of Woven Fabric
SCOPE
1.1 These test methods cover four options for measuring fabric length and are applicable to full rolls or bolts of materials.
1.2 There are four approved options of measuring length as follows:
1.2.1 Option A—Hand (Section 6).
1.2.2 Option B—Drum (Section 7).
1.2.3 Option C—Clock (Section 8).
1.2.4 Option D—Folding (Section 9).
1.3 The values stated in either SI units or in other units shall be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system must be used independently of the other, without combining values in any way.
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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Designation:D3773–90(Reapproved 2002)
Standard Test Methods for
Length of Woven Fabric
This standard is issued under the fixed designation D 3773; 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 (e) indicates an editorial change since the last revision or reapproval.
1. Scope 3.1.2.1 Discussion—Astable fabric as defined above and as
used in these test methods is a fabric that does not change
1.1 These test methods cover four options for measuring
significantly with multiple passes through measuring devices.
fabric length and are applicable to full rolls or bolts of
3.1.3 woven fabric, n—a structure produced when at least
materials.
twosetsofstrandsareinterlaced,usuallyatrightanglestoeach
1.2 There are four approved options of measuring length as
other, according to a predetermined pattern of interlacing, and
follows:
such that at least one set is parallel to the axis along the
1.2.1 Option A—Hand (Section 6).
lengthwise direction of the fabric.
1.2.2 Option B—Drum (Section 7).
3.1.4 For definitions of other textile terms used in these test
1.2.3 Option C—Clock (Section 8).
methods, refer to Terminology D 123.
1.2.4 Option D—Folding (Section 9).
1.3 The values stated in either SI units or in other units shall
4. Summary of Test Methods
be regarded separately as standard. The values stated in each
4.1 The length is measured from one end of the fabric to the
system may not be exact equivalents; therefore, each system
other, using a suitable graduated device, or apparatus as
must be used independently of the other, without combining
described in the option used.
values in any way.
1.4 This standard does not purport to address all of the
5. Conditioning
safety concerns, if any, associated with its use. It is the
5.1 Condition the specimens as directed in Practice D 1776.
responsibility of the user of this standard to establish appro-
5.2 When full rolls or bolts of fabric cannot be properly
priate safety and health practices and determine the applica-
conditioned in a reasonable time with available facilities,
bility of regulatory limitations prior to use.
perform the tests without conditioning and report the actual
2. Referenced Documents conditions prevailing at the time of the test. Such results may
2 not correspond with the results obtained after testing in the
2.1 ASTM Standards:
standard atmosphere for testing textiles.
D 123 Terminology Relating to Textiles
D 1776 Practice for Conditioning Textiles for Testing
6. OptionA—Hand
3. Terminology 6.1 Significance and Use—The hand method specifies that
the length of a fabric be measured in a relaxed tension-free
3.1 Definitions:
manner. This test method is the referee method to which all
3.1.1 length, n—of a fabric, the distance from one end of a
other test methods shall be compared for the establishment of
fabric to the other, measured parallel to the side edge of the
their accuracy. This test method can be used for acceptance
fabric while the fabric is under zero tension and is free of folds
testing, although it is not used as a general practice because it
or wrinkles.
is too time consuming.
3.1.2 stable fabric, n—a textile fabric in which the dimen-
6.1.1 In case of a dispute arising from differences in
sions do not change significantly during processing or use.
reported test values when using Test Methods D 3773 for
acceptance testing of commercial shipments, the purchaser and
These test methods are under the jurisdiction of ASTM Committee D13 on supplier should conduct comparative tests to determine if there
Textiles and are the direct responsibility of Subcommittee D13.60 on Fabric Test
is a statistical bias between their laboratories. Competent
Methods, Specific.
statistical assistance is recommended for the investigation of
Current edition approved Jan. 26, 1990. Published May 1990. Originally
bias.As a minimum, the two parties should take a group of test
published as D 3773 – 89. Last previous edition D 3773 – 89. Replaces Sections 6
to 12 of Methods D 1910 – 64 (1975), Test for Construction Characteristics of
specimens which are as homogeneous as possible and which
Woven Fabrics.
are from a lot of material of the type in question. The test
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
specimens should then be randomly assigned in equal numbers
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 to each laboratory for testing.The average results from the two
the ASTM website.
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D3773–90 (2002)
laboratories should be compared using Student’s t-test for 8. Option C—Clock
unpaired data and an acceptable probability level chosen by the
8.1 Significance and Use—The clock option may be used
two parties before testing is begun. If a bias is found, either its
for measuring the length of a fabric for the purpose of
cause must be found and corrected or the purchaser and the
acceptance testing, provided the user’s laboratory verifies for
supplier must agree to interpret future test results in the light of
the specific weave and construction of interest that results
the known bias.
obtained by this test method agree within 6 0.5 % of those
6.2 Apparatus:
obtained by the hand method. Use the device on any machine
6.2.1 Flat Horizontal Surface, at least3m(3yd) long and
equipped to handle continuous lengths of fabric. In cases of
having a width equal to or greater than the widest fabric to be
dispute, the hand option shall be used.
measured.
8.2 Apparatus:
6.2.2 Length-Measuring Device, metal rule or steel tape,1
8.2.1 Measuring Device, consisting of a pair of identical
m (1 yd) minimum length graduated in 1 mm ( ⁄16 in.) units,
wheels, mounted 75 to 100 mm (3 to 4 in.) apart on a
and
free-running common axle connected to a counting mechanism
6.2.3 P
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