MIL-PRF-24635E
Color deviation values
ĆE
ĆA
ĆB
ĆL
Colors defined by tristimulus values
Navy Haze Gray No. 27 (26270)
0.5
0.3
0.3
0.3
Color deviation values
ĆE
ĆA
ĆB
ĆL
FED-STD-595 color no.
26173, 26373, 36173, 36270, 36373
0.5
0.3
0.3
0.3
All other colors
1.0
0.5
0.5
0.5
3.5.17 Gloss. The 60-degree specular gloss of the coating shall be as follows:
Class
Gloss
85
1
2
45-60
3
7-12
3.5.18 Solar reflectance (grades B and C). Low solar absorbance coatings shall meet the following reflectance
requirements:
Reflectance
Wavelength
Colors 26173, 26270, and 26373
0.65
800 nanometers
0.70
1000 nanometers
Color 26008
0.45
800 nanometers
0.55
1000 nanometers
3.5.19 X-cut or cross-cut adhesion test. (see 4.5.19)
3.5.19.1 Types III and IV coatings. The coating system shall achieve a minimum ASTM D3359 classification
of 4A or 4B.
3.5.19.2 Types V and VI coatings. The coating system shall achieve a minimum ASTM D3359 classification
of 5A or 5B.
3.5.20 Overcoat adhesion. Fully cured coatings shall be able to be overcoated with each of the systems
identified in 3.4 and 4.5.20, with no visible film irregularities. The overcoat shall not wrinkle or lift the first coat,
and shall dry to a smooth, uniform finish. Coatings shall not require additional coats to only be applied over wet or
touch-tacky surfaces. At a minimum, each overcoated panel shall achieve the same ASTM D3359 classification as
when the system alone is tested in accordance with 4.5.19.
3.5.21 Flexibility. A cured film of coating shall bend without cracking or flaking.
13
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