MIL-DTL-24631A(SH)
(g)
Set-to-touch, hours (hr)
(h)
Dry hard, hr
Gloss 60 , %
(i)
(j)
Contrast ratio
(k)
Coarse particles
Flash point, degrees Celsius ( C)(degrees Fahrenheit [ F])
(l)
(m)
Mass per unit volume, grams/liter (g/L) (pounds/gallon [lb/gal])
(n)
Color, % (wet reflectance [RW], or FED-STD-595)
(o)
Color fastness
(p)
Pot life, hr
3.4.2 Volatile organic content (VOC). When tested in accordance with
4.5.4, the volatile organic content (VOC) of the paints shall be in accor-
dance with the requirements of the individual specification sheets (see 6.2).
3.4.3 Color fastness. When tested in accordance with 4.5.5, the after
test Rw of formulas 184, 185 and 187 paints shall be 85 to 115 percent (%) of
the RW measured before testing (delta [ ] RW of ±15%). After testing, E of
the dry color of formula 187 shall be not more than 4 Commission Internation-
ale de l'Eclairage (CIE; International Commission on Illumination) LAB units
(CIELAB). After testing, E of the dry colors of each of the formulas 184,
185 and 186 paints shall be not more than 3 CIELAB units.
3.5 Qualitative requirements. The paints shall be in accordance with
the qualitative requirements of 3.5.1 through 3.5.7.
3.5.1 Brushing properties. When tested in accordance with 4.5.9, the
paint shall not exhibit excessive drag during brushing or when being laid off.
When dry, the paint shall be free of: (a) obvious lap marks or brush marks,
(b) gloss and color variations or mottling and (c) pigment streaking or
separation.
3.5.2 Spraying properties. When tested in accordance with 4.5.10, the
liquid paint shall not exhibit running, sagging or fogging. When dry, the
paint shall not exhibit dusting, floating, mottling, bubbling, wrinkling,
streaming, pinholing, cratering, orange peel, blushing, blooming or silking.
When tested in accordance with 4.5.11, there shall be
3.5.3 Adhesion.
no loss of paint.
3.5.4 Water immersion. When tested in accordance with 4.5.12, the
paint shall not whiten, change color, crack or be easily furrowed off the
rubber, flake, chip or powder.
3.5.5
Storage stability.
3.5.5.1 Partially-full containers - formulas 184, 185 and 186. When
tested in accordance with 4.5.13, the individual components shall have no
skinning, livering, curdling, hard settling (caking) or gummy sediment. Each
individual component shall be capable of being readily mixed to a smooth
uniform state within 5 minutes with no surface float (separated pigments or
other ingredients on the surface of the liquid) when mixed with a paddle or
mechanical mixer and shall have a consistency not greater than 5 units from
the original Kreb unit consistency before testing. Paint mixed from the
individual partially full containers shall meet all other requirements of this
specification and the applicable individual specification sheet.
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