ASTM D6659-01
(Practice)Standard Practice for Sampling and Preparation of Wet Blue for Physical and Chemical Tests
Standard Practice for Sampling and Preparation of Wet Blue for Physical and Chemical Tests
SCOPE
1.1 This practice covers the sampling and preparation of wet blue for physical and chemical tests. The product is grouped into lots that are randomly sampled in such a manner as to produce a representative sample of the lot. This sample may be used to determine compliance of the lot with applicable specification requirements, and on the basis of results, the lot may be accepted or rejected in its entirety.
1.2 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:D6659–01
Standard Practice for
Sampling and Preparation of Wet Blue for Physical and
Chemical Tests
This standard is issued under the fixed designation D 6659; 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 4. Conditioning
1.1 Thispracticecoversthesamplingandpreparationofwet 4.1 Chemical and physical tests of wet blue, unless other-
blue for physical and chemical tests. The product is grouped wise specified in the applicable test method, specification, or
into lots that are randomly sampled in such a manner as to procurement document, shall be performed under standard
produce a representative sample of the lot.This sample may be atmospheric conditions, which is 50 6 4% relative humidity at
used to determine compliance of the lot with applicable a temperature of 23 6 1 °C (73.4 6 2 °F). If testing conditions
specification requirements, and on the basis of results, the lot vary from this standard the actual conditions must be included
may be accepted or rejected in its entirety. in the report of all such tests.
1.2 This standard does not purport to address all of the
5. Sampling Procedure
safety concerns, if any, associated with its use. It is the
5.1 Prior to sampling, identify the product properly as a lot
responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica- or batch.
5.2 Select units from locations scattered throughout the lot,
bility of regulatory limitations prior to use.
not from the same portion of the lot, such as a single pallet,
2. Terminology
carton, layer, etc. Take without regard to quality.
2.1 Definitions: 5.2.1 The number of samples taken depends on the reliabil-
2.1.1 lot (or batch), n—units of products from a single type, ity of the test results, the deviation of the properties, and the
grade, class, size, and composition, manufactured under essen- error of the testing procedure. The number of samples taken
tially the same conditions and time. may be at the discretion of the user and the related test method
2.1.1.1 Discussion—Wet blue in formed lots should be and should also be recorded on the test report. It is recom-
produced from: (1) Units of product of similar size and type. mended that 12 samples be taken for every 50,000 square feet
(2) Chromium tanning material obtained from the same pro- of hide or skin. These 12 shall be considered a lot, or batch.
ducer(orfunctionallyequivalent).(3)Asingleproductmethod.
NOTE 1—By reason of the high moisture content of wet blue, samples
(4) Sequential production batches.
should be taken after the wringing operation and immediately sealed in
2.1.2 unit, n—a piece of wet blue in the form in which it is
airtight plastic wrap. Store in a cool place until used.
purchased, such as a single hide, skin, or any part thereof.
5.3 The standard location for sampling wet blue is the
kidney area (designated as TEST AREA “a” in Fig. 1).
3. Significance and Use
Sampling in the belly or shoulder area is only applicable if that
3.1 The sampling procedures described in this practice have
is the end product being sold or purchased:
been designed to ensure random sampling of wet blue for
5.3.1 Skins—Cut the test piece to the size and shape
physical and chemical tests. Wet blue is a natural product and
required for the tests to be made, with one edge parallel to and
as such is subject to extensive variability. The physical and
1 in. (25.4 mm) from the backbone line, beginning 3 in. (76
chemical properties vary considerably depending on location
mm) from the root of the tail. Pieces shall be cut from only one
on the hide, side, or skin from which the test sample is taken.
side of the backbone of each skin. The test area for skins
Random sampling of specimens from a predefined location and
corresponds to area a for cattlehides of Fig. 1.
orientation minimizes test bias and variability. This pract
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