MIL-PRF-61002B
4.2.2 Solvent resistance.
4.2.2.1 Preparation of test labels and test panels. Test labels and test panels shall be prepared
as specified in 4.2.1.3.
4.2.2.2 Method. The test specimen shall be immersed for 15 minutes +/- 1 minute in the
environmentally safe solvent/degreaser that the procurement of the labels was intended to meet or
exceed the performance requirements associated with the end objectives of the application. At the
end of the soaking period, the labels shall be removed from the solvent, and the labels shall be
examined immediately to determine compliance to 3.15.2.2. If a test panel has not been specified,
smooth plate glass panels approximately 3 by 9 inches in size will be used.
4.2.3 Detergent resistance.
4.2.3.1 Preparation of test labels and test panels. Test labels and test panels shall be prepared
as specified in 4.2.1.3.
4.2.3.2 Method. The test specimens shall be immersed for 15 minutes +/- 1 minute in a
solution of 20 grams of detergent powder (laboratory or hospital grade), dissolved in 1,000 ml of
distilled water. The detergent solution shall be at a temperature of 120 degrees F +/- 10 degrees F
during the soaking period.
4.2.4 Ultraviolet (UV) light condensation.
4.2.4.1 Apparatus. The apparatus shall consist of an Ultraviolet (UV) light condensation
cabinet as described in ASTM G 154, or equivalent.
4.2.4.2 Preparation of test labels and test panels. The labels and test panels shall be
prepared as specified in 4.2.1.3 and ASTM G 154. Porous test panels, such as wood and
fiberboard, shall be backed with MIL-PRF-131 barrier material.
4.2.4.3 Method. The test labels shall be positioned in the test chamber and tested in
accordance with the procedures specified in ASTM G 154. An arbitrary time greater than eight
hours of radiant exposure may be used, evaluation performed in exposure increments to determine
any significant change in test specimens, if required for conformance to a particular specification.
4.2.4.4 Required exposure. When a single exposure period is used, a time or radiant
exposure period is used that will produce the largest performance differences between the test
material and the control material.
4.2.4.5 Minimum exposure time. The minimum exposure time used shall be that necessary
to produce a substantial change in the material being evaluated. An exposure time that produces a
significant change in one type of material cannot be assumed applicable to other types of materials.
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