MIL-DTL-700B
4.6.10.2 Partially filled container. A sample of enamel shall be
prepared and tested in accordance with method 3021.1 of FED-STD-141. After 48
hours inspect for skinning, livering, curdling, hard caking, or gummy
sediment. Examine for ease of mixing. The enamel shall be as specified in
3.4.5.1.2.
4.6.11 Water resistance and film hardness. Spray apply a 0.076 + 0.025
mm (0.003 + 0.001 inch) film of the enamel on a panel prepared as specified in
4.6.1. Cure at room temperature [approximately 22 C (72 F)] for 48 hours.
Immerse 50 percent of the panel in room temperature distilled water for 24
hours. Test for pencil hardness in accordance with ASTM D 3363. The coated
panel shall be placed on a firm horizontal surface. A set of calibrated
drawing leads or equivalent calibrated wood pencils meeting the two end
points, the pencil that will not cut into or gouge the film (pencil hardness)
following hardness scale (6B-5B-4B-3B-B-HB-F-H-2H-3H-4H-5H-6H) shall be used
in the test. Whichever pencil is used, it shall be held firmly against the
film at a 45-degree angle (point away from the operator) and pushed away from
the operator in a 6.5 mm (1/4 inch) stroke. The process shall be started with
the hardest pencil and continued down the scale of hardness to the pencil that
will not scratch the film (scratch hardness). The condition and hardness
shall be as specified in 3.4.10.
4.6.12 Compatibility with topcoats. Prepare and prime three panels as
specified in 4.6.1. To the first panel apply a 0.046 to 0.076 mm (0.002 to
0.003 inch; 2 to 3 mil) coating (topcoat) of paint manufactured to
MIL-E-24635; to the second panel apply a 0.046 to 0.076 mm (0.002 to 0.003
inch; 2 to 3 mil) topcoat of paint qualified to MIL-E-24763, to the third
panel apply a 0.046 to 0.076 mm (0.002 to 0.003 inch; 2 to 3 mil) topcoat of
the MIL-DTL-700 test enamel produced to this specification. After drying
(curing the three panels for 48 hours at 50 C (122 F), cool to ambient
laboratory conditions and apply a 0.046 to 0.076 mm (0.002 to 0.003 inch;
2 to 3 mil) topcoat of the test enamel. Examine for blistering, wrinkling or
peeling of the enamel. Check adhesion by method 6304.1 of FED-STD-141 except
that the knife used may be an ordinary pocket knife or utility knife. Enamel
condition shall be as specified in 3.4.9 and 3.4.11.1.
4.6.13 Surface appearance. Prepare a flow out test panel and inspect
in accordance with method 3011.1 of FED-STD-141. Enamel shall be as specified
in 3.4.12.
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 materiel 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.
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