MIL-PRF-87978A
4.4 Requirements cross-reference matrix. Table II provides a cross-reference matrix of the
Section 3 requirements tested or verified in the paragraphs below.
Table II: Requirements Cross-Reference Matrix
REQUIREMENT
VERIFICATION
3.4
4.5.1
3.5
4.5.2
3.6
4.5.3
3.7
4.5.4
3.8
4.5.5
3.9
4.5.6
4.5 Test Procedures.
4.5.1 Viscosity. Viscosity of the paint remover shall be 15 centipoises or less at 77 ±2°F
(25 ±1°C), and shall be determined using a Model LVF Brookfield Viscometer, or its equivalent
in accordance with ASTM D2196. Readings shall be taken after the spindle has been operating
for a minimum of three minutes.
4.5.2 Flammability. A 1 inch by 6 inch (2.54 cm by 15.24 cm) panel shall be prepared from any
aluminum alloy conforming to Standard ASTM B209. A hole shall be drilled near one end of the
panel to facilitate hanging. The panel shall be dipped into a container of the paint remover and
immediately suspended on a ring stand. A microburner flame, not exceeding 3/16 inch (5 mm) in
length shall be passed back and forth along the lower edge of the panel within a 2 second period.
This operation shall be repeated three times at 3 second intervals. If the paint remover ignites, the
burner shall be removed and observation made to determine whether the paint remover continues
to burn. Burning duration in excess of 3 seconds after removal of the flame shall be cause for
rejection.
4.5.3 Corrosion. Two specimens, 2 inches by 4 inches (5.08 cm by 10.16 cm) of each of the
metals and treatment specified in Table I shall be prepared. Each specimen shall be weighed to
the nearest 0.1 mg, placed singly in suitable glass jars at approximately a 45° angle, and
completely covered with the paint remover. The jars shall be placed in a chamber at 100°F
(38°C) for a total exposure period of 24 hours. At the end of the period, the specimen shall be
thoroughly rinsed with a suitable solvent, oven dried at 375 °F for one hour, desiccated for one-
half hour and reweighed to the nearest 0.1 mg. Pitting, etching of the base metal, or weight
changes exceeding the limits of Table I shall be cause for rejection.
4.5.4 Paint Stripping Efficiency.
4.5.4.1 Preparation of test panels. After the test panels have been prepared as specified in
Table III, four panels of each metal shall be painted with the coating system as specified. All paint
topcoats shall be color number 17875 in accordance with Federal Standard 595. The coating
system shall consist of the following:
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