ASTM D1813-13(2023)

Standard Test Method for Measuring Thickness of Leather Test Specimens

SIGNIFICANCE AND USE
3.1 This test method shall be used where precise dimensions are necessary for calculation of properties expressed in physical units. It is not intended to replace practical thickness measurements based on commercial portable tools, nor is it implied that thickness measurements made by the two procedures will agree exactly.
SCOPE
1.1 This test method covers the measurement of the thickness of leather test specimens in which the dimensions of the specimens are used directly in determining the results of tests for physical properties. This test method does not apply to wet blue.  
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, 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: 31-Dec-2022
• ICS: 59.140.30 - Leather and furs
• Technical Committee: D31 - Leather
• Drafting Committee: D31.07 - Physical Properties

Relations

• Refers: ASTM D1610-01(2013) - Standard Practice for Conditioning Leather and Leather Products for Testing
• Effective Date: 01-May-2013
• Refers: ASTM D1610-01(2007) - Standard Practice for Conditioning Leather and Leather Products for Testing
• Effective Date: 01-Apr-2007
• Refers: ASTM D1610-01 - Standard Practice for Conditioning Leather and Leather Products for Testing
• Effective Date: 10-May-2001
• Refers: ASTM D1610-00 - Standard Practice for Conditioning Leather and Leather Products for Testing
• Effective Date: 10-May-2001

Overview

ASTM D1813-13(2023) is the international standard test method for measuring the thickness of leather test specimens. Developed and maintained by ASTM International, this standard provides a precise method for determining the thickness of leather, which is essential when specimen dimensions are used directly in evaluating physical properties. It is not designed to substitute everyday commercial thickness gauges and does not apply to "wet blue" leather. This standard is significant in laboratory environments and quality control settings that require accurate and repeatable measurements.

Key Topics

• Precision in Measurement: Emphasizes the importance of using standardized equipment such as a gauge equipped with a dial micrometer, flat anvil, and a presser foot with specific loading requirements to deliver reliable and reproducible results.
• Test Method Scope: Applies exclusively to leather test specimens where thickness directly impacts the accuracy of other physical property measurements. It excludes the use of wet blue items and commercial, less precise measurements.
• Standard Units: The method uses inch-pound units as standard, with SI equivalents provided for informational purposes only.
• Safety and Compliance: Users are responsible for ensuring the safe application of this test method and for conforming with applicable regulatory and environmental practices.
• Reporting Requirements: Test reports must present the average thickness for each specimen and, if applicable, the average thickness for the sample set.
• Precision and Reliability: The coefficient of variation is defined as less than 5.0%, ensuring consistency between consecutive specimen measurements.

Applications

This standard is widely utilized in industries where leather is used for products with critical physical property requirements, such as:

• Leather Goods Manufacturing: Ensures the leather thickness conforms to design and functional specifications for products like footwear, garments, upholstery, and accessories.
• Quality Assurance: Used by quality control laboratories to verify batch consistency and adherence to product standards.
• Material Testing Laboratories: Supports the assessment of physical properties (such as tensile strength or abrasion resistance) where accurate thickness measurements are essential for meaningful results.
• Regulatory Compliance: Assures manufacturers and suppliers that their products meet internationally recognized test methods and standards, aiding market acceptance and product traceability.

Related Standards

Users and organizations working with ASTM D1813-13(2023) may also find the following standards relevant:

• ASTM D1610 - Practice for Conditioning Leather and Leather Products for Testing, referenced for specimen preparation and conditioning.
• Other ASTM Leather Standards - For assessment of physical properties like tear strength, flex resistance, or finish adhesion.
• International Standards - Related test methods from ISO, EN, or other global bodies may complement ASTM D1813 for comprehensive material assessment.

Practical Value

By following ASTM D1813-13(2023), organizations gain:

• Consistency in product quality and test results for leather materials.
• Confidence in physical property data that supports product performance claims.
• Credibility through adherence to internationally recognized best practices, facilitating domestic and export trade.

Keywords: ASTM D1813, leather thickness test, leather specimen measurement, leather testing standard, leather quality control, ASTM leather standards.

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: D1813 − 13 (Reapproved 2023)
Standard Test Method for
Measuring Thickness of Leather Test Specimens
This standard is issued under the fixed designation D1813; 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 measurements based on commercial portable tools, nor is it
implied that thickness measurements made by the two proce-
1.1 This test method covers the measurement of the thick-
dures will agree exactly.
ness of leather test specimens in which the dimensions of the
specimens are used directly in determining the results of tests
4. Apparatus
for physical properties. This test method does not apply to wet
4.1 Gauge, equipped with a dial micrometer, a flat anvil,
blue.
and a presser foot loaded by a dead mass.
1.2 The values stated in inch-pound units are to be regarded
4.2 Dial, graduated to read to the nearest 0.01 mm, with
as standard. The values given in parentheses are mathematical
small second dial graduated to read to the nearest 1 mm or to
conversions to SI units that are provided for information only
the nearest 0.001 in. and 0.1 in. respectively.
and are not considered standard.
4.3 Anvil, flat, with a diameter of 0.395 in. 6 0.02 in.
1.3 This standard does not purport to address all of the
(10 mm 6 0.5 mm) and projecting 0.1 in. (2.5 mm) from the
safety concerns, if any, associated with its use. It is the
surface of a flat circular platform about 2 in. (50 mm) in
responsibility of the user of this standard to establish appro-
diameter.
priate safety, health, and environmental practices and deter-
mine the applicability of regulatory limitations prior to use.
4.4 Presser Foot, having a flat surface 0.395 in. 6 0.02 in.
1.4 This international standard was developed in accor-
(10 mm 6 0.5 mm) in diameter, and can be lifted by a lever at
dance with internationally recognized principles on standard-
least 13 mm or 0.5 in. It shall be dead-mass loaded to exert a
ization established in the Decision on Principles for the
total load of 13.86 oz 6 0.35 oz (393 g 6 10 g) on the
Development of International Standards, Guides and Recom-
specimen. The load is equivalent to 500 g/cm . The contacting
mendations issued by the World Trade Organization Technical
surface of the presser foot and the surface of the anvil shall be
Barriers to Trade (TBT) Committee.
parallel within 0.0001 in. (0.0025 mm).
2. Referenced Documents 5. Test Specimen
2.1 ASTM Standards:
5.1 The test specimen shall be a piece of leather that has
D1610 Practice for Conditioning Leather and Leather Prod- been conditioned according to Practice D1610 and cut to the
ucts for Testing
dimensions required for the particular physical test.
3. Significance and Use 6. Procedure
6.1 Place the specimen on the anvil, and lower the presser
3.1 This test method shall be used where precise dimensions
footgently(donotdrop)untilitrestsonthespecimen.Takethe
are necessary for calculation of properties expressed in phys
...