ASTM D1610-18(2023)

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: D1610 − 18 (Reapproved 2023)
Standard Practice for
Conditioning Leather and Leather Products for Testing
This standard is issued under the fixed designation D1610; 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 (2) a temperature of 20 °C 6 2 °C (68.0 °F 6 3.6 °F) and
a relative humidity of 65 % 64%.
1.1 This practice covers the conditioning of all units and
Condition set (1) is used as the standard for leather testing in
specimens of leather and leather products prior to testing and
NorthAmerica and condition set (2) is used as the standard for
the conditions under which they should be tested.This practice
leather testing in Europe and Japan.
does not apply to wet blue.
1.2 This standard does not purport to address all of the
4. Summary of Test Method
safety concerns, if any, associated with its use. It is the
4.1 The conditioning prescribed in this practice is designed
responsibility of the user of this standard to establish appro-
to obtain reproducible test results on leather and leather
priate safety, health, and environmental practices and deter-
products by the standardization of the relative humidity and
mine the applicability of regulatory limitations prior to use.
temperature conditions to which the leather or leather product
1.3 This international standard was developed in accor-
is subjected prior to and during testing.
dance with internationally recognized principles on standard-
ization established in the Decision on Principles for the
5. Significance and Use
Development of International Standards, Guides and Recom-
mendations issued by the World Trade Organization Technical 5.1 Temperature and relative humidity have an influence on
Barriers to Trade (TBT) Committee.
many of the physical properties of leather. Depending on
environmental conditions the moisture content in leather may
2. Referenced Documents
vary significantly. Standardized conditioning in part allows for
reliable comparisons to be made among different leather and
2.1 ASTM Standards:
leather products, and among different laboratories.
D1517 Terminology Relating to Leather
E337 Test Method for Measuring Humidity with a Psy-
6. Apparatus
chrometer (the Measurement of Wet- and Dry-Bulb Tem-
peratures)
6.1 Room, in which the standard atmosphere is automati-
2.2 IU Standards:
cally maintained.
IUP/3 Conditioning
6.2 Psychrometer—Eitheraslingpsychrometer,orastation-
ary type psychrometer having the air circulated over the
3. Terminology
thermometer bulbs.
3.1 Definitions:
NOTE 1—It is preferable to draw air over the thermometer bulb rather
3.1.1 For definitions of leather terms used in this practice,
than blow air, from a fan source, over them. Heat from the fan may cause
refer to Terminology D1517.
errors in the readings.
3.1.2 standard atmospheric conditions—for leather and
6.3 Thermometers—The thermometers should conform ap-
leather testing, one of two sets of conditions:
proximatelytothefollowingrequirements:range0 °Cto52 °C
(1) a temperature of 23 °C 6 2 °C (73.4 °F 6 3.6 °F) and
(32 °F to 122 °F); graduation 0.2 °C (0.5 °F). They should be
a relative humidity of 50 % 64%.
matched to within 0.1 °C (0.25 °F) throughout the range used.
Calibrate thermometer in accordance with manufacturer’s in-
This practice is under the jurisdiction ofASTM Committee D31 on Leather and
structions.
is the direct responsibility of Subcommittee D31.07 on Physical Properties. This
practice was developed in cooperation with the American Leather Chemists Assn. NOTE 2—Under ordinary conditions, an error of 1 % in relative
Current edition approved Jan. 1, 2023. Published January 2023. Originally
humidity corresponds to an error of approximately 0.1 °C (0.2 °F) in the
approved in 1984. Last previous edition approved in 2018 as D1610 – 18. DOI:
wet-bulb depression.
10.1520/D1610-18R23.
6.4 Chamber for maintaining 65 % relative humidity—A
Journal of the Society of Leather Trades’ Chemists, Vol XLII, No. 12, pp
386–387. relative humidity of 65 % 62%at20°C 6 2 °C can be
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D1610 − 18 (2023)
NOTE6—Thewet-bulbtemperature,T ,indegreesCelsiuscorrespond-
maintained in a closed space by the use of a saturated solution
w
ing to a relative humidity of 50 % at a given air temperature, t, in degrees
of certain salts in water (in which the solid phase is present in
Celsius (dry-bulb) and a given barometric pressure, B, in centimetres of
...