MIL-DTL-43191J
3.8 Finish. The cloth shall be dyed, or dyed and printed on the filling effect side as the face.
The cloth shall be desized, dyed or dyed and printed. The Class 2, 3, 4, 5 and 6 cloths shall be
given a water repellent treatment as specified in 3.8.1.
3.8.1 Water repellency (Class 2, 3, 4, 5, and 6 ). The Class 2, 3, 4, 5 and 6 cloths shall be
given a fluorocarbon (Quarpel Type) water repellent treatment. Testing shall be as specified in
4.4.3.
TABLE VIII. Water repellency (Class 2, 3, 4, 5 and 6)
Hydrostatic pressure
(centimeter)
Dynamic absorption (percent)
Spray rating 3/
Min. lot avg.
Max. lot avg.
Initial
20 1/
30 2/
90, 90, 80
After 3 launderings
----
30 2/
----
20 1/
After 15 launderings
----
----
1/ No individual specimen shall exceed 25 percent.
2/ No individual specimen shall fall below 25 centimeters.
3/ The results of the three individual determinations on the sample unit for spray rating shall be
equal to or better than the specified ratings when tested as specified in 4.4.3.
3.8.2 pH. The pH value of the water extract of the finished cloth shall be no less than 5.0
and no more than 8.5 when tested as specified in 4.4.3.
3.8.3 Resistance to organic liquid. The Class 2, 3, 4, 5 and 6 finished cloths shall show no
wetting by n-tetradecane initially and after 15 laundering when tested as specified 4.4.3.
3.9 Dimensional Stability. The shrinkage or elongation both in the warp and in the filling of
the finished cloth shall not be greater than 2.5 percent for the individual sample unit and not
greater than 2.0 percent for the lot average when tested as specified in 4.4.3.
3.10 Face identification. The Class 1 and 2 cloths filling effect side shall be identified as the
face side by stamping that side with the word "Face" at each end of the roll.
3.11 Seam efficiency. The finished cloth shall have a seam efficiency of not less than 80
percent when tested as specified in 4.4.3.
3.12 Length and put-up. For Government procurements only, unless otherwise specified
(see 6.2), the cloth shall be furnished in continuous lengths, each not less than 50 yards. Each
length shall be put-up full width on a roll as specified in 5.1.
3.13 Fiber identification. Each roll of the finished cloth shall be labeled or ticketed for fiber
content in accordance with the Rules and Regulations Under the Textile Fiber Products
Identification Act.
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