MIL-DTL-508K
temperature of 7500 ± 200 K illumination of 100 ± 20 foot candles, and shall be a good match to
the standard sample under horizon lamplight at 2300 ± 200 K.
3.6 Colorfastness (all except Class 1 and Type II). The finished cloth shall conform to the
colorfastness requirements listed below in Table I when tested as specified in 4.2.5.
TABLE I. Colorfastness requirements.
Light (40
Perspiration
(acid & alka-
Accelerated
Frosting
hrs or
Laundering 170 kJ)
line) 1/
Crocking Weathering
Carbon
Colors Evaluation
2/ (min.)
(min.)
3/ (min.)
(170 kJ)
Black
(3 cycles)
1/ (min)
(only) 2/
1/ (min.)
All solid colors
3-4
3-4
3-4
3.5
3-4
All colors except
Black 357
3-4
3-4
4
Black 357
3.0
3.0
1.0
4
OG 107, CG 483,
Dk. Green 355,
3-4
Brown 356,
Black 357
Lt. Green 354,
Desert Sand 500,
3.0
Urban Gray 501,
Foliage Green 502
1/ Rated using AATCC Evaluation Procedure 1 and Evaluation Procedure 2.
2/ Rated using AATCC Evaluation Procedure 1
3/ Rated using AATCC Evaluation Procedure 8
3.7 Pattern execution, Class 4 and 5. The pattern on the finished cloth shall match the
standard sample with respect to design, colors and registration of the respective areas. Each
pattern area shall show solid coverage. Skitteriness exceeding that shown by the standard
sample shall not be acceptable. The warpwise pattern repeat of class 4 printed finished cloth
shall be 27.25 (+1.25, -2.50) inches. The warpwise pattern repeat of the Class 5 printed finished
cloth shall be 36 (+1.25, 2.50) inches. When the standard sample is not referenced for pattern
execution, a pattern drawing shall be provided and the pattern for Class 4 shall match that of
Drawing 2-1-1516 and Class 5 shall match that of drawing 2-1-2519 (see 2.2.2, 6.2, and 6.5).
3.8 Spectral reflectance, Class 2 and 3. The spectral reflectance values for the solid color
specified shall conform to the requirements specified in Table II when tested as specified in
4.2.5.
5
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