MIL-DTL-53039E
4.6.8 Solvent analysis for VOC content determination. Determine the VOC content in
accordance with ASTM D3960. Check for compliance with 3.4.3.
4.6.8.1 VOHAP content of coatings. Hazardous solvent content of each individual coating shall
be determined in accordance with ASTM D3271 or EPA Method 311, as applicable. Check for
compliance with 3.4.4.
4.6.9 Hiding power (contrast ratio). Using a sprayed sample from the color determination (see 4.6.2),
determine the reflectance using the daylight reflectance factor of ASTM D2805 over the black and
white portion of the card and record the values as RB/RW and check for compliance with table VII.
4.6.10 Viscosity, Krebs-Stormer. Determine viscosity in accordance with ASTM D562. Check
for compliance with table VII.
4.6.11 Drying time. Spray the mixed coating to a dry film thickness of 2 ± 0.2 mils (50 ± 5
microns) and determine the drying under ambient conditions in accordance with ASTM D5895.
Check for compliance with table VII.
4.6.12 Specular gloss. Spray the mixed coating to a dry film thickness of 2 ± 0.2 mils (50 ± 5
microns). Test for 60 degree gloss and 85 degree gloss (sheen) in accordance with ASTM D523.
Check for compliance with table VII.
4.6.13 Infrared reflectance (for Aircraft Green, 34031, Aircraft Gray, 36300, Interior Aircraft
Black, 37031, and Dark Sandstone, 33510). Determine the infrared reflectance on the black
portion of the sprayed sample in 4.6.2. For Aircraft Green, 34031 and Interior Aircraft Black,
37031 determine the infrared reflectance value at 870 nanometers. Determine the infrared
reflectance for Aircraft Gray, 36300 and Dark Sandstone, 33510 at 1500 nanometers. In all
evaluations, use a spectrophotometer which is capable of measuring the total diffuse reflectance
in accordance with ASTM E308 and ASTM E1331. Nonconformance with table I shall
constitute failure of this test.
4.6.14 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 reexamination of the
contents, the disclosure of any gel bodies or undispersed pigment indicates unsatisfactory settling
properties.
4.6.15 Storage stability.
4.6.15.1 Accelerated storage stability. Fill an epoxy lined pint container with the coating and
determine the viscosity in accordance with ASTM D562. Tightly seal the container and place
sample in a preheated oven for 7 days at 60 ± 1 °C (140 ± 1.8 °F). Allow to cool to room
temperature and examine the contents. Check for compliance with 3.6.2.1.
4.6.15.2 Full container storage stability. Allow 2 quarts of liquid coating to stand undisturbed
for 6 and 12 months respectively in accordance with ASTM D1849. Examine the contents for
skinning. Reseal and agitate the can for 5 minutes on a paint shaker. Reexamine and evaluate
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