ASTM D6659-10

Standard Practice for Sampling and Preparation of Wet Blue for Physical and Chemical Tests

SIGNIFICANCE AND USE
The sampling procedures described in this practice have been designed to ensure random sampling of wet blue for physical and chemical tests. Wet blue is a natural product and as such is subject to extensive variability. The physical and chemical properties vary considerably depending on location on the hide, side, or skin from which the test sample is taken. Random sampling of specimens from a predefined location and orientation minimizes test bias and variability. This practice defines these parameters.
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 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.
1.3 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-Sep-2010
• ICS: 19.020 - Test conditions and procedures in general
• ICS: 59.140.10 - Processes and auxiliary materials
• Technical Committee: D31 - Leather
• Drafting Committee: D31.02 - Wet Blue

Relations

• Replaces: ASTM D6659-08 - Standard Practice for Sampling and Preparation of Wet Blue for Physical and Chemical Tests
• Effective Date: 01-Oct-2010
• Replaced By: ASTM D6659-10(2015) - Standard Practice for Sampling and Preparation of Wet Blue for Physical and Chemical Tests
• Effective Date: 01-Dec-2015
• Referred By: ASTM D6714-16(2021) - Standard Test Method for Chromic Oxide in Ashed Wet Blue (Perchloric Acid Oxidation)
• Effective Date: 01-Oct-2010
• Referred By: ASTM D6657-16(2021) - Standard Test Method for pH of Wet Blue and Wet White
• Effective Date: 01-Oct-2010
• Referred By: ASTM D7967-21 - Standard Test Method for Analysis of Chrome Content (as Cr<inf>2</inf>O<inf>3</inf>) in Wet Blue using Atomic Absorption or ICP
• Effective Date: 01-Oct-2010
• Referred By: ASTM D6716-08(2020) - Standard Test Method for Total Ash in Wet Blue or Wet White
• Effective Date: 01-Oct-2010
• Referred By: ASTM D8451-22 - Standard Test Method for Calculation of Unfixed Chrome Concentration in Wet Blue
• Effective Date: 01-Oct-2010
• Referred By: ASTM D7674-14a(2021) - Standard Test Method for Hexane/Petroleum Ether Extract in Wet Blue and Wet White
• Effective Date: 01-Oct-2010
• Referred By: ASTM D7477-16(2021) - Standard Test Method for Determining the Area Stability of Wet Blue Submersed in Boiling Water
• Effective Date: 01-Oct-2010
• Referred By: ASTM D6658-08(2020) - Standard Test Method for Volatile Matter (Moisture) of Wet Blue by Oven Drying
• Effective Date: 01-Oct-2010
• Referred By: ASTM D2868-17 - Standard Test Method for Nitrogen Content (Kjeldahl) and Hide Substance Content of Leather, Wet Blue and Wet White
• Effective Date: 01-Oct-2010
• Referred By: ASTM D6656-16(2021) - Standard Test Method for Determination of Chromic Oxide in Wet Blue (Perchloric Acid Oxidation)
• Effective Date: 01-Oct-2010

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: D6659 − 10
StandardPractice for
Sampling and Preparation of Wet Blue for Physical and
1
Chemical Tests
This standard is issued under the fixed designation D6659; 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. Scope 3.1.2 unit, n—a piece of wet blue in the form in which it is
purchased, such as a single hide, skin, or any part thereof.
1.1 Thispracticecoversthesamplingandpreparationofwet
blue for physical and chemical tests. The product is grouped
4. Significance and Use
into lots that are randomly sampled in such a manner as to
4.1 The sampling procedures described in this practice have
produce a representative sample of the lot.This sample may be
been designed to ensure random sampling of wet blue for
used to determine compliance of the lot with applicable
physical and chemical tests. Wet blue is a natural product and
specification requirements, and on the basis of results, the lot
as such is subject to extensive variability. The physical and
may be accepted or rejected in its entirety.
chemical properties vary considerably depending on location
1.2 The values stated in inch-pound units are to be regarded
on the hide, side, or skin from which the test sample is taken.
as standard. The values given in parentheses are mathematical
Random sampling of specimens from a predefined location and
conversions to SI units that are provided for information only
orientation minimizes test bias and variability. This practice
and are not considered standard.
defines these parameters.
1.3 This standard does not purport to address all of the
5. Conditioning
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro-
5.1 Unlessotherwisespecifiedintheapplicabletestmethod,
priate safety and health practices and determine the applica-
specification, or procurement document, samples shall be
bility of regulatory limitations prior to use.
tempered to the ambient laboratory conditions prior to prepa-
ration of testing.
2. Referenced Documents
2
6. Sampling Procedure
2.1 ASTM Standards:
D6658 Test Method for Volatile Matter (Moisture) of Wet
6.1 Prior to sampling, identify the product properly as a lot
Blue by Oven Drying
or batch.
6.2 Select units from locations scattered throughout the lot,
3. Terminology
not from the same portion of the lot, such as a single pallet,
3.1 Definitions:
carton, layer, etc. Take without regard to quality.
3.1.1 lot (or batch), n—units of products from a single type,
6.2.1 The number of samples taken depends on the reliabil-
grade, class, size, and composition, manufactured under essen-
ity of the test results, the deviation of the properties, and the
tially the same conditions and time.
error of the testing procedure. The number of samples taken
3.1.1.1 Discussion—Wet blue in formed lots should be
may be at the discretion of the user and the related test method
produced from: (1) Units of product of similar size and type.
and should also be recorded on the test report. It is recom-
(2) Chromium tanning material obtained from the same pro-
mended that 12 samples be taken for every 50,000 square feet
ducer(orfunctionallyequivalent).(3)Asingleproductmethod.
of hide or skin. These 12 shall be considered a lot, or batch.
(4) Sequential production batches.
NOTE 1—By reason of the high moisture content of wet blue, samples
should be taken after the wringing operation and immediately sealed in
1
This practice is under the jurisdiction ofASTM Committee D31 on Leather and airtight plastic wrap. Store in a cool place until used.
is the direct responsibility of Subcommittee D31.02 on Wet Blue.
6.3 The standard location for sampling wet blue is the
Current edition approved Oct. 1, 2010. Published October 2010. Originally
kidney area (designated as TEST AREA “a”in Fig. 1).
approved in 2001. Last previous edition approved in 2008 as D6659-08. DOI:
10.1520/D6659-10.
Sampling in the belly or shoulder area is only applicable if that
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
is the end product being sold or purchased:
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
6.3.1 Skins—Cutthetestpiecetothesizeandshaperequired
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. for the tests to be made, with one edge parallel to and 1 in.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

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D6659 − 10
FIG. 1 Location of Tes
...

This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation:D6659–08 Designation:D6659–10
Standard Practice for
Sampling and Preparation of Wet Blue for Physical and
1
Chemical Tests
This standard is issued under the fixed designation D6659; 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. 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 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical
conversions to SI units that are provided for information only and are not considered standard.
1.3 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.
2. Referenced Documents
2
2.1 ASTM Standards:
D6658 Test Method for Volatile Matter (Moisture) of Wet Blue by Oven Drying
3. Terminology
2.1
3.1 Definitions:
2.1.1
3.1.1 lot (or batch), n—units of products from a single type, grade, class, size, and composition, manufactured under essentially
the same conditions and time.
2.1.1.1
3.1.1.1 Discussion—Wet blue in formed lots should be produced from: (1) Units of product of similar size and type. (2)
Chromium tanning material obtained from the same producer (or functionally equivalent). (3) A single product method. (4)
Sequential production batches.
2.1.2
3.1.2 unit, n—a piece of wet blue in the form in which it is purchased, such as a single hide, skin, or any part thereof.
3.Significance and Use
3.1The sampling procedures described in this practice have been designed to ensure random sampling of wet blue for physical
and chemical tests. Wet blue is a natural product and as such is subject to extensive variability. The physical and chemical
propertiesvaryconsiderablydependingonlocationonthehide,side,orskinfromwhichthetestsampleistaken.Randomsampling
of specimens from a predefined location and orientation minimizes test bias and variability.This practice defines these parameters.
4. Conditioning
4.1Chemical and physical tests of wet blue, unless otherwise specified in the applicable test method, specification, or
procurement document, shall be performed under standard atmospheric conditions, which is 50 6 4% relative humidity at a
temperature of 23 6 1 °C (73.4 6 2 °F). If testing conditions vary from this standard the actual conditions must be included in
the report of all such tests. Significance and Use
1
This practice is under the jurisdiction of ASTM Committee D31 on Leather and is the direct responsibility of Subcommittee D31.02 on Wet Blue.
Current edition approved Sept.Oct. 1, 2008.2010. Published October 2008.2010. Originally approved in 2001. Last previous edition approved in 20072008 as
D6659-01(2007).D6659-08. DOI: 10.1520/D6659-108.
2
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1

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D6659–10
4.1 The sampling procedures described in this practice have been designed to ensure random sampling of wet blue for physical
and chemical tests. Wet blue is a natural product and as such is subject to extensive variability. The physical and chemical
propertiesvaryconsiderablydependingonlocationonthehide,side,orskinfromwhichthetestsampleistaken.Randomsampling
of specimens from a predefined location and orientation minimizes test bias and variability.This practice defines these parameters.
5. Conditioning
5.1 Unlessotherwisespecifiedintheapplicabletestmethod,specification,orprocurementdocument,samplesshallbetempered
to the ambient laboratory conditions prior to preparation of testing.
6.
...