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!UL-STD-720A (OS)
11 October 1974
Superseding
HIL-STD-720 (NORD)
29 June 1959
MILITARY STANDARD
FORMULAFOR YELLOWFIFGT FIPZ CO@OSITION
This Standard is approved for use by all Depertmants end Agencies of
the Depertmsnt of Defense
1.
SCOPE
1.1 This
cotqmsition
sandles.
Standard establishes the formula for yel.kw first firs
for use in ignition or first fire of illuminating pyrotechnic
m
TABLEI
-GiiR
Tetranitro- Zi
rconi urn Bind
In9redt ent
Nitrate
Silicon
carbazol e
Nydrfde Solut%n
Speclf ica- 14:4;:-~62
y;-yo mi7Tm3- Tm=mm
tion
Class 3
Granulation
Class 0
B
Note 3
percent by
~Uelght
50.0 * 2.0
20.0 * 1.0 10.0 * 1.0
15.0 * 1.0
5.0 * 0.5
2.
DETAILEDREQUIREMENTS.
2.1 The moisture ccmtent of the composition span not exceed 0.2
percent when tested in accordance with the moisturs test of UIL-B-152.
2.2 The composition shall be thoroughly blended end aged for a minimum
of 24 hours prior to use.
2.3. Silicon shall be as specified in Table 1, except that the fozm shall
be cubical crystalline (not amorphous) and the average particle size shall
be 8 to 15 microns.
2.4 The processing of the materials, the blending operation, and storage
shall take place under conditions which do not permit the rslative humidily
to exceed 40 percent and with a maximumtemperature of 80°F( 27°C ).
2.5 The solid materials shall be preblended prior to the additi;i of
the laminac mixture.
: 2.6 The blender shall be cleaned after each batch. Acetnne has been
b
found satisfactory for this operation.
Due to its high volatility and
ease of ignition, extreme caution should be exercised in acetone. : +:
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