ASTM D4907-00

Standard Test Method for Nitrocellulose in Finish on Leather

SCOPE
1.1 This test method is intended for use in identifying nitrocellulose in the finish on all types of leathers. This test method does not apply to wet blue.  
1.2 The values stated in SI units are to be regarded as the 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 and health practices and determine the applicability of regulatory limitations prior to use.

General Information

• Status: Historical
• Publication Date: 09-Sep-2000
• ICS: 59.140.10 - Processes and auxiliary materials
• Technical Committee: D31 - Leather
• Drafting Committee: D31.06 - Chemical Analysis

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation:D4907–00
Standard Test Method for
Nitrocellulose in Finish on Leather
This standard is issued under the fixed designation D 4907; 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 (e) indicates an editorial change since the last revision or reapproval.
1. Scope dark blue color, then nitrocellulose is not present in the finish.
Iftheindicatorsolutiondevelopsadarkbluecoloraftercontact
1.1 This test method is intended for use in identifying
with the finish, it indicates the presence of nitrocellulose or has
nitrocellulose in the finish on all types of leathers. This test
developed color from colored finish components, or both.
method does not apply to wet blue.
6.2 Repeat the above procedure except that the blank
1.2 The values stated in SI units are to be regarded as the
solution is employed instead of the indicator solution. If a dark
standard.
bluecolordoesnotdevelop,whereasitdoeswhentheindicator
1.3 This standard does not purport to address all of the
solution is applied, then nitrocellulose is present in the finish
safety concerns, if any, associated with its use. It is the
and colored finishing materials do not interfere.
responsibility of the user of this standard to establish appro-
6.3 If colored finish material develops a dark blue color in
priate safety and health practices and determine the applica-
the presence of the blank solution, then place the specimen
bility of regulatory limitations prior to use.
finish side up in a watch glass and pour acetone on the
2. Significance and Use
specimen, until completely covered, for dissolving any nitro-
cellulose present in the specimen.After allowing the specimen
2.1 This test method is used to identify nitrocellulose in
to soak in acetone for approximately 2 min, remove the
finishes on all types of leathers.
specimenfromthewatchglassandtheevaporateacetoneinthe
3. Apparatus
watch glass on the steam oven to dryness. When cooled to
room temperature, place a few drops of indicator solution on
3.1 Borosilicate Glass Watch Glass, 100 mm diameter.
one side of the watch glass near the rim and allow the drops to
3.2 Reagent Bottles, two, (4 fl oz each) equipped with glass
run downward.At another location on the watch glass, place a
joint dropping pipet.
few drops of blank solution near the rim and allow to run
4. Reagents
downward. If nitrocellulose is present in the finish, a dark blue
color will develop as the indicator solution runs downward into
4.1 Indicator solution prepared by dissolving 0.1 g diphe-
the watch glass whereas the blank solution will not show any
nylamine in solution containing 100 mLof sulfuric acid and 30
color development.
mL of distilled water.
4.2 Blank solution comprising
...