ASTM D4907-10(2020)

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: D4907 − 10 (Reapproved 2020)
Standard Test Method for
Nitrocellulose in Finish on Leather
This standard is issued under the fixed designation D4907; 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 4.4 Hazards Statement—All reagents and chemicals should
be handled with care. Before using any chemical, read and
1.1 This test method is intended for use in identifying
follow all safety precautions and instructions on the manufac-
nitrocellulose in the finish on all types of leathers. This test
turer’s label or MSDS (Material Safety Data Sheet).
method does not apply to wet blue.
5. Test Specimen
1.2 The values stated in SI units are to be regarded as
standard. No other units of measurement are included in this
5.1 The test specimen shall be approximately 1 cm of the
standard.
finished leather.
1.3 This standard does not purport to address all of the
6. Procedure
safety concerns, if any, associated with its use. It is the
6.1 Place the test specimen in the watch glass with the finish
responsibility of the user of this standard to establish appro-
side up. Apply one or 2 mL of indicator solution on the finish
priate safety, health, and environmental practices and deter-
and allow to run over the side of the leather on to the watch
mine the applicability of regulatory limitations prior to use.
glass. After 3 min, if the indicator solution does not develop a
1.4 This international standard was developed in accor-
dark blue color, then nitrocellulose is not present in the finish.
dance with internationally recognized principles on standard-
If the indicator solution develops a dark blue color after contact
ization established in the Decision on Principles for the
with the finish, it indicates the presence of nitrocellulose or has
Development of International Standards, Guides and Recom-
developed color from colored finish components, or both.
mendations issued by the World Trade Organization Technical
Barriers to Trade (TBT) Committee.
6.2 Repeat the above procedure except that the blank
solution is employed instead of the indicator solution. If a dark
2. Significance and Use
blue color does not develop, whereas it does when the indicator
2.1 This test method is used to identify nitrocellulose in
solution is applied, then nitrocellulose is present in the finish
finishes on all types of leathers.
and colored finishing materials do not interfere.
6.3 If colored finish material develops a dark blue color in
3. Apparatus
the presence of the blank solution, then place the specimen
3.1 Borosilicate Glass Watch Glass, 100 mm diameter.
finish side up in a watch glass and pour acetone on the
3.2 Reagent Bottles, two, (4 fl oz each) equipped with glass
specimen, until completely covered, for dissolving any nitro-
joint dropping pipet. cellulose present in the specimen.After allowing the specimen
to soak in acetone for approximately 2 min, remove the
4. Reagents
specimen from the watch glass and the evaporate acetone in the
4.1 Indicator solution prepared by d
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