MIL-PRF-43473G
NOTE: Monitoring of dry bulb temperature, wet bulb depression, irradiance, and black panel
temperature is recommended through the use of chart recorders.
4.4.9 Adhesion of coating. ASTM-D-751, Adhesion of Coating with 2 inch wide reinforced
coating adhesion specimens, cyanoacrylate (solventless) adhesive, and pulling clamp speed of
5 mm/s. Three test specimens shall be tested for each test surface, as appropriate. Test
specimens shall be prepared by adhering only coating or film surfaces of test strips together in
such a manner that like surfaces are adhered (i.e., face-to face or back-to-back).
4.4.10 Blocking. ASTM D-751, Determination of Blocking Resistance of Fabrics Face with
Rubber or Plastics at Elevated Temperatures, except that only one specimen shall be exposed
at an oven temperature of 180°F +2°F for 30 minutes.
4.4.11 Color matching. The color of the waterproof 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.
4.4.12 Spectral reflectance tests. Spectral reflectance data shall be determined on the face
side and shall be obtained from 600 to 860 nm respectively, at 20 nm intervals on a
spectrophotometer relative to a barium sulfate standard, the preferred white standard. Other
white reference materials may be used, provided they are calibrated to absolute white; e.g.,
magnesium oxide, or vitrolite tiles. The spectral band width at 860 nm shall be less than 26
nm. Reflectance measurements shall be made by either the monochromatic or polychromatic
mode of operation. When the polychromatic mode is used, the spectrophotometer shall
operate with the specimen diffusely illuminated with the full emission of a continuous source
that simulates either CIE Source A or CIE Source D65. The specimen shall be measured as a
single layer backed with two layers of the same fabric and shade. Measurements shall be
taken on a minimum of two different areas, and the data averaged. The measurement areas
should be at least 6 inches away from the edges of the finished cloth. The specimen shall be
viewed at an angle no greater than 10° from normal, with the specular component included.
Photometric accuracy of the spectrophotometer shall be within 1 percent and wavelength
accuracy within 2 nm. The standard aperture size used in the color measurement device shall
be 1.0 to 1.25 inches in diameter. Any color having spectral reflectance values falling outside
the limits at four or more of the wavelengths specified in 3.5 shall be considered a test failure.
4.4.13 Pattern execution. The pattern on the cloth shall be matched to the pattern drawing
(see 6.4).
4.4.14 Toxicity assessment. The cloth shall be tested for toxicity as follows:
a) Title 40, Code of Federal Regulations, 1994 Edition;
Section 798.4100- Dermal Sensitization
Section 798.4470- Primary Dermal Irritation
Section 798.4500- Primary Eye Irritation
Marzulli, F. & H. Maibach, "Contact Allergy: Predictive Testing in Humans",
Advances in Modern Toxicology, Volume 4, pp 353-372, 1977.
b) As an alternative to animal and human testing, the contractor may provide
information which certifies that the finished product is composed of chemicals or
materials which have been safely used commercially where prolonged skin contact
has occurred.
12
For Parts Inquires call Parts Hangar, Inc (727) 493-0744
© Copyright 2015 Integrated Publishing, Inc.
A Service Disabled Veteran Owned Small Business