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|  MIL-M-85831(AS)
3.8.7 Overall leakaqe. When tested as specified In 4.8.2.7, there shall
be no leakage during a one minute period.
3.8.8 Valsalva device. The valsalva device shall operate freely and
smoothly when tested as specified In 4.8.2.8. There shall be no failure of
the valsalva device or any of its components.
3.8.9 Restraint harness. The restraint harness assembly shall operate
freely and smoothly when tested as specified in 4.8.2.9. There shall be no
failure of the restraint harness or any of its components.
3.8.10 Anti-suffocation device. The anti-suffocation device shall operate
freely when tested as specified in 4.8.2.10. There shall be no failure or
damage of the anti-suffocation device or any of its components.
3.8.11 Chemical aqent permeation. The materials of the mask shall be
resistant to liquid agent permeation with an end point of not less than 360
minutes when tested as specified in 4.8.2.11.1, 4.8.2. 11.2 and 4.8.2.11.3.
3.8.12 Optical. The lens area of the facepiece shall meet the
requirements of MIL-V-43511, Class I, except for the impact requirement, when
tested as specified in 4.8.2.12.
3.8.13 Field of Vision. The unobstructed field of vision of the mask
(without the helmet being worn) shall be:
Vertical - 90" without head rotation
a.
Horizontal - 160" without head rotation,
b.
when tested as specified in 4.8.2.13.
3.8.14 Cyclic Breathing. The mask shall show no damage or failure from
the effects of cyclic breathing when tested as specified in 4.8.2.14.
3.8.15 Drinking. A drinking device for hot and cold liquids and liquid
medication shall provide a flow of not less than one quart in 10 minutes.
Drinking device preparation time shall be not more than two minutes and the
start of water intake not more than 15 seconds when tested as specified in
4.8.2.15.
3.8.16 Flame and flash protection. The mask shall provide flame and flash
protection so that not greater than 2 percent of the head and neck areas
receive burns. The mask shall not melt and shall show minimal charring and
shall be self extlnguishing when tested as specified in 4.8.2.16,
3.8.17 Toxicity. All materials of components that come in contact with
the skin shall not cause undue sensitization or primary irritation of the
wearers skin. As specified in EPA 560/6-82-001, objective evidence of the
tests specifed in 3.8.17.1 thru 3.8.17.3 shall be submitted to substantiate
this requirement.
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