ASTM D2875-00(2020)
(Test Method)Standard Test Method for Insoluble Ash of Vegetable-Tanned Leather
Standard Test Method for Insoluble Ash of Vegetable-Tanned Leather
SIGNIFICANCE AND USE
4.1 This test method gives the amount of ash remaining in the specimen after water extraction to remove water solubles from the leather in accordance with Test Method D2876. The insoluble ash is used in calculating the combined tannin because it is part of the tanned fiber structure that does not leach from the leather during water extraction.
SCOPE
1.1 This test method covers the determination of the insoluble ash in all types of vegetable-tanned leathers. This test method does not apply to wet blue.
1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
1.4 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
- Technical Committee
- D31 - Leather
- Drafting Committee
- D31.01 - Vegetable Leather
Relations
- Effective Date
- 01-Sep-2017
- Effective Date
- 01-Apr-2017
- Effective Date
- 01-Apr-2012
- Refers
ASTM D2876-00(2010) - Standard Test Method for Water-Soluble Matter of Vegetable-Tanned Leather - Effective Date
- 01-Apr-2010
- Effective Date
- 01-Oct-2006
- Refers
ASTM D2876-00(2005) - Standard Test Method for Water-Soluble Matter of Vegetable-Tanned Leather - Effective Date
- 01-Sep-2005
- Effective Date
- 10-Sep-2000
- Effective Date
- 10-May-1996
- Effective Date
- 10-May-1996
Overview
ASTM D2875-00(2020) - Standard Test Method for Insoluble Ash of Vegetable-Tanned Leather provides an internationally recognized procedure for determining the insoluble ash content in vegetable-tanned leathers. This standardized method is essential for evaluating the non-soluble mineral components present after water extraction, as defined by complementary test methods like ASTM D2876. The amount of insoluble ash is a key factor in calculating combined tannins and understanding the composition and quality of vegetable-tanned leather. This standard is developed in accordance with the World Trade Organization’s principles for international standardization and is maintained by ASTM Committee D31 on Leather.
Key Topics
- Scope & Applicability:
- Applies to all types of vegetable-tanned leather.
- Does not apply to wet blue leather.
- Utilizes only SI units of measurement.
- Purpose:
- Measures residual ash not leached by water, which represents mineral matter and components integral to leather’s tanned fiber structure.
- Supports calculation of combined tannin in leather analysis.
- Health, Safety, and Environment:
- Users must ensure compliance with relevant safety and environmental guidelines.
- Responsibility for compliance with regulatory requirements lies with the user.
- Test Method Summary:
- Water-soluble matter is extracted from the sample as per ASTM D2876.
- The remaining specimen is heated in a controlled furnace to constant weight, with the residue measured as insoluble ash.
- Ash is expressed as a percentage of the original sample.
- Precision:
- Duplicate test results by the same operator should not differ by more than 0.1% insoluble ash.
- Recognizes variability due to sample heterogeneity.
Applications
ASTM D2875 plays a vital role in the leather manufacturing and quality assurance sectors, including:
- Leather Quality Control:
- Provides a metric for impurities that remain after leaching, helping manufacturers assess process consistency and finished leather composition.
- Research & Development:
- Enables comparative studies on the impact of tanning processes on leather mineral content.
- Regulatory Compliance:
- Assures adherence to international trade, quality, and labeling standards for vegetable-tanned leathers.
- Customer Communication:
- Quality metrics based on insoluble ash can be communicated to customers as part of technical specifications.
- Combined Tannin Calculation:
- Being a critical factor in combined tannin determination, supports process validation for organic and mineral content balance in tanned leathers.
Related Standards
For a comprehensive approach to leather analysis, these related ASTM standards may be referenced alongside ASTM D2875-00(2020):
- ASTM D2617: Test Method for Total Ash in Leather
- Measures total ash to differentiate between soluble and insoluble contents.
- ASTM D2876: Test Method for Water-Soluble Matter of Vegetable-Tanned Leather
- Specifies steps for extracting water-soluble compounds before insoluble ash determination.
Keywords: insoluble ash, vegetable-tanned leather, leather testing, tannin calculation, leather quality control, ASTM D2875, leather analysis, mineral content in leather
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Frequently Asked Questions
ASTM D2875-00(2020) is a standard published by ASTM International. Its full title is "Standard Test Method for Insoluble Ash of Vegetable-Tanned Leather". This standard covers: SIGNIFICANCE AND USE 4.1 This test method gives the amount of ash remaining in the specimen after water extraction to remove water solubles from the leather in accordance with Test Method D2876. The insoluble ash is used in calculating the combined tannin because it is part of the tanned fiber structure that does not leach from the leather during water extraction. SCOPE 1.1 This test method covers the determination of the insoluble ash in all types of vegetable-tanned leathers. This test method does not apply to wet blue. 1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.4 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.
SIGNIFICANCE AND USE 4.1 This test method gives the amount of ash remaining in the specimen after water extraction to remove water solubles from the leather in accordance with Test Method D2876. The insoluble ash is used in calculating the combined tannin because it is part of the tanned fiber structure that does not leach from the leather during water extraction. SCOPE 1.1 This test method covers the determination of the insoluble ash in all types of vegetable-tanned leathers. This test method does not apply to wet blue. 1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.4 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.
ASTM D2875-00(2020) is classified under the following ICS (International Classification for Standards) categories: 59.140.30 - Leather and furs. The ICS classification helps identify the subject area and facilitates finding related standards.
ASTM D2875-00(2020) has the following relationships with other standards: It is inter standard links to ASTM D2617-17a, ASTM D2617-17, ASTM D2617-12, ASTM D2876-00(2010), ASTM D2617-06, ASTM D2876-00(2005), ASTM D2876-00, ASTM D2617-96, ASTM D2617-96(2001). Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
ASTM D2875-00(2020) is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
Standards Content (Sample)
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: D2875 − 00 (Reapproved 2020)
Standard Test Method for
Insoluble Ash of Vegetable-Tanned Leather
This standard is issued under the fixed designation D2875; 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 and constant weight is attained. The weighed residual matter is
termed “insoluble ash” and is calculated as a percentage of the
1.1 This test method covers the determination of the in-
original sample.
soluble ash in all types of vegetable-tanned leathers. This test
method does not apply to wet blue.
4. Significance and Use
1.2 The values stated in SI units are to be regarded as
4.1 This test method gives the amount of ash remaining in
standard. No other units of measurement are included in this
the specimen after water extraction to remove water solubles
standard.
from the leather in accordance with Test Method D2876. The
1.3 This standard does not purport to address all of the
insoluble ash is used in calculating the combined tannin
safety concerns, if any, associated with its use. It is the because it is part of the tanned fiber structure that does not
responsibility of the user of this standard to establish appro-
leach from the leather during water extraction.
priate safety, health, and environmental practices and deter-
5. Apparatus
mine the applicability of regulatory limitations prior to use.
1.4 This international standard was developed in accor- 5.1 Crucible, porcelain or platinum, large enough to hold
dance with internationally recognized principles on standard- the leather specimen.
ization established in the Decision on Principles for the
5.2 Electric Muffle Furnace, with temperature controller
Development of International Standards, Guides and Recom-
and pyrometer, capable of maintaining a temperature of 600 6
mendations issued by the World Trade Organization Technical
25°C.
Barriers to Trade (TBT) Committee.
6. Test Specimen
2. Referenced Documents
6.1 The specimen shall consist of the 5-g leather sample
2.1 ASTM Standards: remaining after water extraction as directed in Test Method
D2617 Test Method for Total Ash in Leather D2876.Anydeviationfromthissamplesizeshouldbeincluded
D2876 Test Method for Water-Soluble Matter of Vegetable- with the analytical results.
Tanned Leather
7. Procedure
3. Summary of Test Method
7.1 Remove the specimen quantitatively from the extraction
tube, dry at room temperature, transfer to the crucible, place in
3.1 The specimen from which the water-soluble matter has
a cold muffle furnace, and ash at 600 6 25°C until the crucible
been removed is heated at 600 6 25°C until carbon is removed
and contents have reached constant weight as directed in Test
Method D2617. Remove the crucible to a desiccator, cool, and
weigh.
This test method is under the jurisdiction ofASTM Committee D31 on Leather
and is the direct responsibility
...
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