MIL-DTL-43992C
4.4 Methods of inspection.
4.4.1 Presence of labile sulfur. In the determination of labile sulfur in textile materials with
lead acetate, two 1.50 gram + 0.01 gram samples from each material submitted for evaluation
shall be tested. Each of the two samples shall be cut into very small pieces and placed into
separate test tubes. The samples shall be submersed in a stannous chloride solution that contains
100 grams of stannous chloride crystals ACS in 100 milliliters of hydrochloric acid ACS (35
percent concentration) and 50 milliliters of distilled water. A filter paper wet out with a 5.0
percent lead acetate solution contains 5.0 grams of lead acetate CP reagent grade and enough
distilled water to make up a 100- milliliter solution; if the solution is not clear, add a few drops
(one at a time) of glacial acetic acid until the solution is clear. The test over a low flame until the
solution is boiling. The solution should not be heated for more than 15 seconds. A brown to
black stain on the filter paper sho uld be evaluated as follows:
Free
-
The filter paper shows no discoloration or staining of any kind.
Slight
-
The filter paper shows a light tan to light brown discoloration stain.
Moderate
-
The filter paper shows a dark brown discoloration stain.
Severe
-
The filter paper shows a black color stain.
5. PACKAGING
5.1 Packaging. For acquisition purposes, the packaging requirements shall be as specified in
the contract or order (see 6.2). When actual packaging of material is to be performed by DoD
personnel, these personnel need to contact the responsible packaging activity to ascertain
requisite packaging requirements. Packaging requirements are maintained by the Inventory
Control Point's packaging activity within the Military Department or Defense Agency, or within
the Military Department's System Command. Packaging data retrieval is available from the
managing Military Department's or Defense Agency's automated packaging files, CD-ROM
products, or by contacting the responsible packaging activity.
6. NOTES
(This section contains information of a general or explanatory nature which may be helpful but
is not mandatory.)
6.1 Intended use. The cloth is intended for use in the manufacture of shirts worn by the Armed
Forces.
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