MIL-DTL-11414F
4.5.10 Specular gloss. Prepare a 0.002 inch dry film thickness drawdown of the enamel using a
film applicator with the appropriate gap clearance on a glass panel according to ASTM D3891,
and air dry for 24 hours. Measure the 60 degree specular gloss in accordance with ASTM D523
and evaluate for compliance with table II.
4.5.11 Viscosity (reduced). Reduce eight parts, by volume, of the enamel with one part, by
volume, of HAP-free thinner recommended by the manufacturer. Measure the viscosity in
accordance with ASTM D562 and evaluate for compliance with table II.
4.5.12 Drying time. Prepare a 0.002 inch dry film thickness drawdown of enamel using a film
applicator with the appropriate gap clearance on a glass panel and air dry for the specified time.
Check the drying time in accordance with ASTM D1640 and evaluate for compliance with
table II.
4.5.13 Contrast ratio. Prepare a 0.002 inch dry film thickness drawdown of the enamel using a
film applicator with the appropriate gap clearance and allow to air dry for 24 hours. Determine
the contrast ratio in accordance with ASTM D2805 and evaluate for compliance with table II.
4.5.14 Condition in container. Upon opening a full previously unopened container the condition
of the contents shall be examined for compliance with 3.6.1. Reseal, then agitate the container
for 3 minutes on a paint shaker and examine for compliance with 3.6.1. On re-examination of the
contents, the disclosure of any gel bodies or undispersed pigment indicates unsatisfactory settling
properties.
4.5.15 Storage stability.
4.5.15.1 Full container. Allow a full standard quart can of the enamel to stand undisturbed for
one year at standard conditions (see 4.3.2) and then re-examine for pigment settling or caking as
specified in 4.5.14. Determine viscosity and perform other applicable tests. Nonconformance to
3.6.2.1 shall constitute failure of this test.
4.5.15.2 Partially filled container. Fill a 1 pint friction top can three-fourths full with enamel.
Secure the top tightly and invert the can momentarily. Store the can in an upright position for 48
hours and check for skinning. Reseal the can and age for 72 hours at 60 °C (140 ºF). After the
aging period, evaluate for compliance with 3.6.2.2.
4.5.16 Accelerated stability. Fill an 8 ounce wide-mouth glass jar, approximately 4 1/2 inches
high and 2 inches in diameter, with the packaged enamel. Secure the cover tightly and invert the
jar momentarily to check for leaks. Place the sample in a 60 ± 2 °C (140 ± 4 °F) oven in an
upright position for 7 days. After this period, allow to cool to room temperature and examine the
contents. Non-conformance to 3.6.3 shall constitute failure of this test.
4.5.17 Suspension properties. Reduce the enamel as specified in 4.5.11. Place six ounces of the
reduced material in an 8-ounce glass jar. Allow the stoppered jar to remain undisturbed for 24
hours and then place the unopened jar on a paint shaker as specified in 4.5.14 and agitate the
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