MIL-PRF-85582E
3.4 Physical properties components before mixing.
3.4.1 Fineness of grind. The fineness of grind of the pigmented component shall be 5 or
greater on the Hegman scale (see 4.5).
3.4.2 Condition in container. Components A and B shall be free of grit, seeds, lumps,
abnormal thickening, or livering, and shall not show pigment flotation nor excessive settling.
They shall mix without excessive foaming, to a smooth, homogeneous, and pourable condition.
In addition, the containers shall exhibit no deformation (see 4.5.2).
3.4.3 Storage stability. The unopened primer coating, as packaged by the manufacturer,
after storage for one year and then admixed, shall meet all requirements of this specification.
The conditions for the storage shall be a daily ambient air temperature that is maintained at 1.7 to
46o C (35 to 115o F) (see 4.5 and 6.3).
3.4.4 Accelerated storage stability. The primer coating, as packaged by the manufacturer,
after storage for 14 days and then admixed, (see 4.5.14) shall meet all requirements of this
specification (see 4.5). The container shall not become deformed or the lid shall not become
unsealed during the storage period.
3.4.5 Freeze-thaw stability. The primer coatings, as packaged by the manufacturer, after
being subjected to five cycles of freezing and thawing and then admixed, shall meet all
requirements of this specification (see 4.5).
3.5 Physical properties - admixed components.
3.5.1 Color.
3.5.1.1 Type I. The color of the admixed type I primer coatings shall be the natural color of
the corrosion inhibiting pigments used. Tinting to a different shade is permitted.
3.5.1.2 Type II. The color of the admixed type II primer coating shall be dark green, black,
or gray.
3.5.2 Odor. The odor of the primer coating, wet or dry, shall be characteristic of the
solvents used (see 4.5).
3.5.3 Viscosity and pot life. The viscosity of the admixed primer coating, when thinned in
accordance with the manufacturer's instructions and stirred constantly at 140 ±30 revolutions per
minute (rpm) in an open or closed container, shall not increase by more than 8 seconds through a
number 4 Ford cup after 4 hours at 23 ±2° C (73 ±5° F). At the end of the 4-hour period, the
applied primer coating shall meet all of the requirements of 3.7.1 through 3.7.4 (see 4.5).
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