Technical data

within five hours, and dry-hard (finger applied with reason-
able force and turned with no deformation of coating) within
eight hours after spray application.
A.2.4 Surface Appearance. When sprayed on a verti-
cal surface to a thickness of 0.0006 to 0.0018 inch, the primer
coating shall not sag, run, or streak, and shall dry to a smooth,
uniform surface free from grit, seeds, craters, blisters, and
other irregularities.
A.3 MIL-PRF-85582 WATERBORNE EPOXY
PRIMER.
A.3.1 Condition in the container. Using a kit of mate-
rial from each batch or lot number to be tested, allow to stand
until reaching room temperature, and open each container and
examine components A and B. Mix each component by hand
or mechanical shaker. Each component shall be capable of
being mixed within 5 minutes. Each component shall be
smooth, homogenous, and pourable. The material shall be
free of grit, skins, seeds, lumps, abnormal thickening, or
livering. In addition, it will reincorporate into a smooth
homogeneous state by mixing with a hand paddle without
exhibiting pigment flotation or excessive settling. The con-
tainers shall not exhibit deformation due to internal pressure.
A.3.2 Viscosity and Pot Life. To test the viscosity and
pot life, mix an adequate quantity of the coating per the
manufacturer’s instructions (measuring each component).
Thin the coating as required per the manufacturer’s instruc-
tions. When the mixed primer is diluted to application
viscosity with water, there shall be no evidence of incompat-
ibility and the material shall be suitable for spray application.
Measure the viscosity and record the results. Place the mixed
coating in container and stir at 140 RPM ±30 RPM for 4
hours. After 4 hours the viscosity shall not increase more than
8 seconds through a No. 4 Ford cup or 9.5 seconds through a
No. 2 Zahn cup.
A.3.3 Drying Time. Mix an adequate quantity of the
coating for spray application of test panels per the manufac-
turer’s instructions (measuring each component), and spray
the primer on the test panels. Test panels shall be aluminum
measuring approximately 3in x 6in. The primer coating shall
be set-to-touch (when touched, no material transfers to finger)
within one hour, and dry-hard (finger applied with reasonable
force and turned with no deformation of coating) within six
hours after spray application.
A.3.4 Surface Appearance. When sprayed on a verti-
cal surface, to a thickness of 0.0006 to 0.0018 inch, the
primer coating shall not sag, run, or streak, and shall dry to a
smooth uniform surface free from grit, seeds, craters, blisters,
and other irregularities.
A.4 TT-P-2760 POLYURETHANE PRIMER.
A.4.1 Condition in the container. Using a kit of mate-
rial from each batch or lot number to be tested, allow to stand
until reaching room temperature, and open each container and
examine components A and B. Mix each component vigor-
ously by hand (using a paddle) or with a mechanical shaker.
Each component shall be capable of being mixed within 5
minutes. Each component shall be smooth, homogenous, and
pourable. The material shall be free of grit, skins, seeds,
lumps, foreign contaminants, abnormal thickening, or liver-
ing. In addition, it will reincorporate into a smooth, homo-
geneous state by mixing with a hand paddle without exhib-
iting pigment flotation or excessive settling. The containers
shall not exhibit deformation due to internal pressure.
A.4.2 Viscosity and Pot Life. To test the viscosity and
pot life, mix an adequate quantity of the prime per the
manufacturer’s instructions (measuring each component).
Check viscosity with either a No. 2 Zahn or No. 4 Ford cup
for conformance with the maximum viscosity ratings given in
Table A-1 at the times specified in the table.
A.4.3 Drying Time. Mix an adequate quantity of the
coating for spray application of test panels per the manufac-
turer’s instructions (measuring each component), and spray
the primer on the test panels. Test panels shall be aluminum
measuring approximately 3 in x 6 in. The primer coating shall
be set-to-touch (when touched, no material transfers to finger)
within five hours, and dry-hard (finger applied with reason-
able force and turned with no deformation of coating) within
eight hours after spray application.
A.4.4 Surface Appearance. When sprayed on a verti-
cal surface to a thickness of 0.0012 to 0.0025 inch, the primer
coating shall not sag, run, or streak, and shall dry to a smooth,
uniform surface free from grit, seeds, craters, blisters, and
other irregularities.
A.5 MIL-PRF-85285 HIGH SOLIDS POLYURE-
THANE.
A.5.1 Condition in the container. Using a kit of mate-
rial from each batch or lot number to be tested, allow to stand
until reaching room temperature, and open each container and
examine component A and B. Mix component A vigorously
by hand using a paddle or with a mechanical shaker. It shall
mix to be smooth, homogenous, and pourable condition. The
material shall be free of grit, seeds, lumps, abnormal thick-
ening, or livering. In addition, it will not show pigment
flotation or excessive settling which cannot be easily reincor-
porated to a smooth, homogenous state. Component B shall
be homogeneous, clear, free from gelation or detectable
particulate matter either suspended in solution or settled on
the inner surface of the container.
A.5.2 Viscosity and Pot Life. To test the viscosity and
pot life, mix an adequate quantity of the coating per the
manufacturer’s instructions (measuring each component).
Check viscosity with either a No. 2 Zahn or No. 4 Ford cup
for conformance with the maximum viscosity ratings given in
Table A-1.
A.5.3 Drying Time. Mix an adequate quantity of the
coating for spray application of test panels per the manufac-
TO 1-1-8
A-2 Change 3