MIL-DTL-10057J
4.7.1.1 Flash composition. Determination of moisture content of the flash composition shall
be performed by transferring a five (5) gram sample to a tared weighing dish. Weigh the dish and the
contents and then place in an oven maintained at a 212°F for three (3) hours. Cool in a desiccator
and weigh. Calculate the loss in weight of the dish and contents as percentage of moisture in the
sample.
4.7.1.2 Moisture content of flash composition. Moisture content shall be controlled as
specified in 4.5.1. For verification, a sample shall be taken from the contents of a "dummy: body used
in conjunction with the loading of the simulators. Moisture content shall be determined as specified
above.
4.7.1.3 Alternate Method (for flash composition). The moisture content shall be determined
in accordance with Method T101.4 of MIL-STD-286. Timer shall be set to the minimum time
required to obtain constant readings. Temperature settings shall be 212°F +/- 41°F.
4.7.2 Composition and granulation of flash powder.
4.7.2.1 Granulation. The particle size shall be determined in accordance with Method A3 of
ISO 10070.
In order to reduce risk and potential hazard of screening the flash composition, this test may be
performed by screening the individual ingredients prior to blending. Alternatively, particle size can
be verified by using the individual specification which is specific to pyrotechnic powder.
4.7.2.2 Composition of flash powder.
4.7.2.2.1 Composition of KP/Al flash powder. The composition shall be determined in
accordance with MIL-P-48239.
4.7.2.2.2 Composition of BP/Al flash powder. Transfer an accurately weighed portion of
approximately 2 grams of the flash powder that was dried for the moisture determination to a tarred
crucible. Wash the sample between 10 and 15 times with 5 milliliter (mL) portions of cold carbon
disulfide and rinse with ether. Continue washing the sample with fifteen, 20 mL portions of cold
distilled water, allowing each flash of the water to remain in contact with the sample approximately 1
minute before applying suction. Aspirate the crucible and contents thoroughly, and dried in an oven
maintained at a temperature of 100 ± 5° C. The crucible and contents shall be cooled in a desicator and
weighed. To the contents remaining in the crucible add several portions of hot, dilute hydrochloric acid
until the reaction subsides. After all reaction has ceased, wash the residue with several portions of hot
water. Dry the crucible and contents in the 100 ± 5° C oven and then cool in a desicator and weigh.
Calculate the percent of aluminum as follows:
(A B) * 100
Percent aluminum= ------------------ %
W
Where:
A= weight of crucible and contents after the carbon disulfide and water extraction, in grams.
B= weight of crucible and contents after the acid extraction, in grams.
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