TABLE I
REQUIREMENTS FOR HIGH BUILD ACRYLIC COATINGS (HBAC)
sample, and in addition, displays color loss no greater than FED-STD-595
color 33655.
(2)
Using double-stick, foam mounting tape (or equal) with a nominal
thickness of 1625 microns 65 mils, apply a rectangular mold with inner
dimensions of 7.6 cm by 25.5 cm 3 in by 10 in to a clean aluminum sample
approximately sized at 15 cm by 30 cm by 0.30 cm 6 in by 12 in by 1/8 in. Do
not remove the tape's plastic backing. Mix and apply excess paint into mold.
Remove excess paint, by squeegee or other appropriate draw down technique,
to a uniform thickness equal to the tape's height. Paint application and draw
down shall be performed within a period of no more than 60 seconds.
Approximately one to two minutes following the draw down, remove tape from
sample and allow coating to cure for a minimum period of one week ASTM D 3924.
Using a micrometer or other appropriate device, measure cured coating
thickness (less sample thickness) to confirm resulting coating application
was at or above 950 microns 38 mils DFT. Inspect coating for visual signs of
cracking and curling. Following a one week cure, coating shall receive a
passing rating if applied greater than 950 microns 38 mils DFT and visually
free of both cracking and curling.
SECTION 02761N
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