MIL-DTL-28781E
TABLE II. Munsell centroid colors.
Tolerance limits
Hue
Value
Chroma
Color
Centroid
H-
H+
V-
V+
C-
C+
Red
2.5R 4/12
1.25R 4/12
3.75R 4/12
2.5R 3/12
2.5R 4.5/12
2.5R 4/10
None
Orange
2.5YR 6/14
1.25R 6/14
3.75YR 6/14
2.5YR 5/14
2.5YR 6.5/14
2.5YR 6/12
None
Brown
2.5YR 3.5/6
10R 3.5/6
5YR 3.5/6
2.5YR 3/6
2.5YR 4/6
2.5YR 3.5/4
2.5YR 3.5/7
Yellow
5Y 8.5/12
2.5Y 8.5/12
7.5Y 8.5/12
5Y
8/12
None
5Y 8.5/10
None
Green
2.5G 5/12
1.25 G5/12
3.75G 5/12
2.5G 4/10
2.5G 5.5/12
2.5G 5/9
None
Blue
2.5PB 4/10
10B 4/10
5PB
4/10
2.5PB 3.5/10
2.5PB 4.5/10
2.5PB 4/9
None
Violet
2.5P 4/10
1.25P 4/10
3.75P 4/10
2.5P 3/10
2.5P 4.5/10
2.5 4/8
None
Neutral
colors
White
N 9/
Value tolerances: V- is N 8.75; no V+ limit.
Chromaticity tolerances: 5R 9/1 5G 9/.5
5YR 9/1 5B 9/.5
5Y 9/1
5P 9/.5
Slate
N 5/
Value tolerances: V- is N 4.5/; V+ is N 5.5/
Chromaticity tolerances: 5R 5/.5 5B 5/.5
5Y 5/.5 5P 5/.5
5G 5/.5
Black
N 2/
Value tolerances: No V- limit; V+ is N 2.3
Chromaticity tolerances: 5R 2/.5 5B 2/.5
5Y 2/.5 5P 2/.5
5G 2/.5
3.2.2.3.2 Insulation stripes. Striping shall be such as to provide readily discernible stripes on the
conductor insulation. These stripes may be integral of the insulation or the striping may be provided as
an internal plastic coating. Striping shall firmly adhere to the insulation and remain intact through the life
of the conductor insulation. Insulation striping in accordance with method 1 of NEMA WC 70 is
acceptable.
3.2.2.4 Twisting of pairs. The insulated conductors shall be twisted into pairs. The average length of
pair twists in any pair in the finished cable, when measured on any 10-foot (3.05 m) length, shall not
exceed 6 inches (152.4 mm).
3.2.2.4.1 Crosstalk loss. The root mean square (rms) output-to-output far-end crosstalk loss, as
measured on the completed cable at a test frequency of 150-kilohertz (kHz), shall not be less than 70 dB
per 1,000 feet (304.8 m).
3.2.2.5 Heat resistance. The insulation shall exhibit no cracking or delamination and no readily
visible defects in any of the wire components after being subjected to the heat conditions of
3.2.2.6 Shrinkage. When subjected to contact with molten solder, the insulation shall not flare away
from the conductor, open up over the bent portion called for in the test, nor shrink back more than
.125 inch. (3.18 mm)
5
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