MIL-PRF-40039E
3.3 Performance requirements. The cloth shall conform to the requirements specified in
Table I and 3.4 through 3.9.
TABLE I. Requirements
Characteristic
Requirements
Weight Oz/yd2 (max)
7.3
Breaking Strength, lbs. (min):
90
Warp
80
Filling
Tearing Strength, grams (min):
770
Warp
575
Filling
Hydrostatic Resistance psi (min):
40
Initial
20
After strength of coating
20
After water immersion
Adhesion of coating, lbs/2 inch width (min) 1/
Initial
6.0
After water immersion
5.0
Stiffness, cm (warp only) (max):
8.0
Blocking, scale rating (max)
No. 2
Resistance to: Leakage (min.)
No leakage
1/ Requirement applies if a film or coating is applied to the surface of the cloth.
3.4 Abrasion resistance. The cloth shall show no loose fibers of the base cloth exposed in the
center one (1) inch of the abraded area.
3.5 Low temperature resistance. The cloth shall show no indication of the finish (if used) to
crack, flake or separate from the base cloth.
3.6 Accelerated weathering resistance. The cloth shall show no increase in softness,
stiffness, tackiness or brittleness when compared with an unexposed specimen of the finished
cloth.
3.7 Color. The color of the cloth shall be Camouflage Green 483 conforming to color chip
34094 of FED-STD-595 (see 3.2 and 6.3).
3.7.1 Color matching. The color of the cloth shall match the standard sample when viewed
under filtered tungsten lamps that approximate artificial daylight and that have a correlated
color temperature of 7500 + 200oK, with illumination of 100 + 20 foot candles, and shall be a
good match to the standard sample under incandescent lamplight at 2300 + 200oK.
3.8 Lumps and knots. The cloth shall be free of solid lumps, defined as a slub C or 4, or
knots which exceed level C on the respective Sears Fabric Defect Scale (see 2.3 and 4.3.1.1).
3.9 Mildew resistance. Plasticizers, if used, shall be restricted to phosphate and phthalate
ester plasticizers only for the purpose of mildew resistance (see 4.4.11).
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