ASTM D2813-03

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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Designation:D2813–03
Standard Practice for
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Sampling Leather for Physical and Chemical Tests
This standard is issued under the fixed designation D 2813; 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.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope single fabricated-leather article in the form in which it is
purchased, such as a counter, pair of shoes, a gasket, etc.
1.1 Thispracticecoversthesamplingoffinishedleatherand
fabricated leather items for physical and chemical tests. The
4. Significance and Use
product is grouped into lots that are randomly sampled in such
4.1 The sampling procedures described in this practice have
a manner as to produce a representative sample of the lot. This
been designed to ensure random sampling of finished leather
sample may be used to determine compliance of the lot with
and fabricated leather items for physical and chemical tests.
applicable specification requirements, and on the basis of
Leather is a natural product and as such is subject to extensive
results, the lot may be accepted or rejected in its entirety.
variability. The physical and chemical properties vary consid-
1.2 This standard does not purport to address all of the
erably depending on location on the hide, side or skin from
safety concerns, if any, associated with its use. It is the
which the test sample is taken. Random sampling of specimens
responsibility of the user of this standard to establish appro-
from a predefined location and orientation minimizes test bias
priate safety and health practices and determine the applica-
and variability. This practice defines these parameters.
bility of regulatory limitations prior to use.
5. Conditioning
2. Referenced Documents
2 5.1 Physical tests of leather and leather products, unless
2.1 ASTM Standards:
otherwise specified in the applicable test method, specification,
D 1610 Practice for Conditioning Leather and Leather
or procurement document, shall be performed under standard
Products for Testing
atmospheric conditions as described in Practice D 1610, which
3. Terminology is 50 6 4 % relative humidity at a temperature of 23 6 1°C
(73.4 6 2°F).
3.1 Definitions:
3.1.1 lot (or batch)—units of products from a single type,
6. Procedure
grade, class, size, and composition, manufactured under essen-
6.1 Prior to sampling, identify the product properly as a lot
tially the same conditions and time.
or batch.
3.1.2 Leather in formed lots should be produced from:
6.2 Select units from locations scattered throughout the lot,
(1) Units of product of similar size and type.
not from the same portion of the lot, such as a single carton,
(2) Tanning and finishing material obtained from the same
layer, etc. Take without regard to quality.
producer (functionally equivalent).
6.2.1 The number of samples taken depends on the reliabil-
(3) A single product method.
ity of the test results, the deviation of the properties, and the
(4) Sequential production batches.
error of the testing procedure. The number of samples taken
3.1.3 unit—a piece of leather in the form in which it is
may be at the discretion of the user and the related test method
purchased, such as a single hide, skin, or any part thereof, or a
and should also be recorded on the test report.
6.3 Location and Size of Cuttings :
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This practice is under the jurisdiction of ASTM Committee D31 on Leather,
6.3.1 Skins—Cut the test piece to the size and shape
and is the direct responsibility of Subcommittee D31.07 on Physical Properties—
required for the tests to be made, with one edge parallel to and
General. This practice was developed in cooperation with the American Leather
1 in. (25.4 mm) from the backbone line, beginning 3 in. (76
Chemists Assn. (Standard Method J 1 – 1956).
mm) from the root of the tail. Pieces shall be cut from only one
Current edition approved Oct. 1, 2003. Published December 2003. Originally
approved in 1984. Last previous edition approved in 1997 as D 2813 – 97.
side of the backbone of each skin. The test area for skins
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For referenced ASTM standards, visit the ASTM website, www.astm.org, or
corresponds to area a for cattlehides of Fig. 1.
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
6.3.2 Cattlehides—The location and size of cutting shall be
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. as follows:
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