1. SCOPE
1.1 This specification covers one grade of
acetylene black.
MIL- A-3
85
0
24 DECEMBER 1952
SUPERSEDING
PXS-1281
3 AUGUST 1948
MILITARY SPECIFICATION
ACETYLENE BLACK
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2. APPLICABLE SPECIFICATIONS,
STANDARDS, DRAWINGS, AND PUBLI-
CATIONS
2.1 The following specifications and stand-
ard, of the issue in effect on date of invita-
tion for bids, form a part of this specification:
SPECIFICATIONS
F
EDERAL
RR-S-366
—Sieves; Standard, Test-
ing.
M
ILITARY
MIL-G-2550
—General Specification for
Ammunition Except Small Arms Am-
munition.
N
AVY DEPARTMENT
General Specifications for Inspection of
Material.
STANDARDS
M
ILITARY
MIL–STD–129—Marking of Shipments.
(Copies of specifications, standards, and drawings
required by contractors in connection with specific
procurement functions should be obtained from the
procuring agency or as directed by the contracting
officer.)
3. REQUIREMENTS.
3.1 Material. – The acetylene black shall be
manufactured by the incomplete combustion
of acetylene by any suitable method which
will produce material conforming to the re-
quirements of this specification.
3.2 Chemical and physical requirements. —
The acetylene black shall conform to the
chemical and physical requirements shown
in table I, when tested in accordance with
the applicable test method specified in sec-
tion 4.
T
ABLE I. —Chemical and physical require-
ments of the acetylene black.
Property
Moisture content, percent,
maximum - - - - - - - - - - - - - - -
Sulfur content, percent,
maximum
- - - - - - - - - - - - - - -
Ether-extractable
matter,
percent, maximum - - - - - - -
Volatile matter, percent,
maximum
- - - - - - - - - - - - - -
Water-soluble matter, per-
cent, maximum
- - - - - - - - - -
Ash, percent, maximum - - - -
pH of water extract - - - - - - -
Test
Require- method
ment paragraph
0.50
0.05
0.50
2.0
4.4.1
4.4.2
4.4.8
4.4.4
0.10
4.4.5
0.10
4.4.6
6.0 ± 1.0
4.4.7
Apparent density, g/cc. - - - - 0.08 ± 0.03
4.4.8
Coarse particles:
Retained on No. 325
sieve
1
, percent, maxi-
mum - - - - - - - - - - - - - - -
0.10
4.4.9
Grit, percent, maximum - - - - 0.05
4.4.10
1
The sieve shall conform to Specification RR-S-
366.
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