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ASTM D6020-00(2020)

(Practice)

Standard Practice for Calculation of (Non-Mineral) Combined Tanning Agents and Degree of Tannage

Standard Practice for Calculation of (Non-Mineral) Combined Tanning Agents and Degree of Tannage

SIGNIFICANCE AND USE
3.1 This practice may be used to determine non-protein or non-nitrogen containing organic matter in leather which is not extractable with water or hexane. Examples would be vegetable tannins and acrylic lubricants.
SCOPE
1.1 This practice covers the determination of the combined tannin and nonextractable organic resins and the degree of tannage of all types of vegetable-tanned leather and leather with organic retannages. This practice does not apply to wet blue.  
1.2 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

General Information

Status
Published
Publication Date
30-Nov-2020
ICS
59.140.10 - Processes and auxiliary materials
Technical Committee
D31 - Leather
Drafting Committee
D31.01 - Vegetable Leather
Current Stage
Ref Project

Relations

Refers
ASTM D2868-17 - Standard Test Method for Nitrogen Content (Kjeldahl) and Hide Substance Content of Leather, Wet Blue and Wet White
Effective Date
01-Apr-2017
Refers
ASTM D2868-10(2015) - Standard Test Method for Nitrogen Content (Kjeldahl) and Hide Substance Content of Leather, Wet Blue and Wet White
Effective Date
01-Dec-2015
Refers
ASTM D2868-10 - Standard Test Method for Nitrogen Content (Kjeldahl) and Hide Substance Content of Leather
Effective Date
01-Nov-2010
Refers
ASTM D3495-10 - Standard Test Method for Hexane Extraction of Leather
Effective Date
01-Nov-2010
Refers
ASTM D2875-00(2010) - Standard Test Method for Insoluble Ash of Vegetable-Tanned Leather
Effective Date
01-Apr-2010
Refers
ASTM D2876-00(2010) - Standard Test Method for Water-Soluble Matter of Vegetable-Tanned Leather
Effective Date
01-Apr-2010
Refers
ASTM D2868-07 - Standard Test Method for Nitrogen Content (Kjeldahl) and Hide Substance Content of Leather
Effective Date
01-Apr-2007
Refers
ASTM D2876-00(2005) - Standard Test Method for Water-Soluble Matter of Vegetable-Tanned Leather
Effective Date
01-Sep-2005
Refers
ASTM D2875-00(2005) - Standard Test Method for Insoluble Ash of Vegetable-Tanned Leather
Effective Date
01-Sep-2005
Refers
ASTM D2875-00 - Standard Test Method for Insoluble Ash of Vegetable-Tanned Leather
Effective Date
10-Sep-2000
Refers
ASTM D3495-00 - Standard Test Method for Hexane Extraction of Leather
Effective Date
10-Sep-2000
Refers
ASTM D2876-00 - Standard Test Method for Water-Soluble Matter of Vegetable-Tanned Leather
Effective Date
10-Sep-2000
Refers
ASTM D2868-96 - Standard Test Method for Nitrogen Content (Kjeldahl) and Hide Substance Content of Leather
Effective Date
10-May-1996
Refers
ASTM D2868-96(2001) - Standard Test Method for Nitrogen Content (Kjeldahl) and Hide Substance Content of Leather
Effective Date
10-May-1996

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ASTM D6020-00(2020) - Standard Practice for Calculation of (Non-Mineral) Combined Tanning Agents and Degree of TannageASTM D6020-00(2020) - Standard Practice for Calculation of (Non-Mineral) Combined Tanning Agents and Degree of Tannage
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ASTM D6020-00(2020) - Standard Practice for Calculation of (Non-Mineral) Combined Tanning Agents and Degree of Tannage
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This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: D6020 − 00 (Reapproved 2020)
Standard Practice for
Calculation of (Non-Mineral) Combined Tanning Agents and
Degree of Tannage
This standard is issued under the fixed designation D6020; 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.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope 4. Procedure
4.1 The chloroform and water extractable materials and
1.1 This practice covers the determination of the combined
insoluble ash in the specimen for test shall be determined in
tannin and nonextractable organic resins and the degree of
accordance with Test Methods D2875, D2876, and D3495.
tannage of all types of vegetable-tanned leather and leather
with organic retannages. This practice does not apply to wet
4.2 The hide substance in the specimen for test shall be
blue.
determined in accordance with Test Method D2868.
1.2 This international standard was developed in accor-
5. Calculation of Results
dance with internationally recognized principles on standard-
ization established in the Decision on Principles for the 5.1 The percentage of combined tannin in the specimen
shall be calculated as follows:
Development of International Standards, Guides and Recom-
mendations issued by the World Trade Organization Technical
Combined tannin, percent 5 100 2 ~A1B1C1D! (1)
Barriers to Trade (TBT) Committee.
where:
A = percent of chloroform-soluble material (mfb),
2. Referenced Documents
B = percent of water-soluble material (mfb),
2.1 ASTM Standards:
C = percent of insoluble ash (mfb), and
D2868 Test Method for Nitrogen Content (Kjeldahl) and D = percent of hide substance (mfb).
(mfb) = moisture free basis.
Hide Substance Content of Leather, Wet Blue and Wet
White
5.2 The degree of tannage shall be calculated as follows:
D2875 Test Method for Insoluble Ash of Vegetable-Tanned
T
Leather
Degree of tannage 5 3100 (2)
D
D2876 Test Method for Water-Soluble Matter of Vegetable-
Tanned Leather where:
D3495 Test Method for Hexane Extraction of Leather
T = percent of combined tannin, and
D = percent of hide substance.
3. Significance and Use
6. Report
3.1 This practice may be used to determine non-protein or
6.1 The combined tannin in the specimen shall be reported
non-nitrogen containing organic matter in leather which is not
to the nearest 0.1 %.
extractable with water or hexane. Examples would be veg-
etable tannins and acrylic lubricants.
6.2 The degree of tan
...

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