MIL-DTL-43719D
Test conditions and test equipment.
4.5
4.5.1 Standard conditions. Unless otherwise specified herein, specimens shall be conditioned and
tested at an air temperature of 73° F ± 2° F and a relative humidity of 50 ± 4 percent. Unless otherwise
specified herein, the applied marking material shall be allowed to stand 72 hours at standard conditions prior to
testing.
Panels.
4.5.2
4.5.2.1 Bare metal. For testing over bare metal, marking materials shall be applied to panels made
from aluminum alloy Alclad 2024 or aluminum alloy 6061, conforming to ASTM B209, and cleaned in
accordance with ASTM D1730. The panels shall be 0.020 by 3 by 6 inches in size.
4.5.2.2 Coated metal. For testing over coated metal, marking material shall be applied to coated panels made
from aluminum alloy Alclad 2024 conforming to ASTM B209. The panels shall be 0.020 by 3 by 6 inches in
size. The panels to be coated shall be anodized in accordance with type II of MIL-A-8625 and finished as
follows: One coat of wash primer conforming to MIL-C-8514, dried 30 minutes, dry film thickness 0.0005 to
0.0007 inch; two coats of white acrylic base coating conforming to the control formula of MIL-PRF-81352, each
0.0005 to 0.0007 inch thick, applied 30 minutes apart. The panels shall be allowed to air dry for 2 hours and
force dried for 1 hour at 180° F ± 5° F. The panels shall be allowed to cool before applying marking material.
4.5.3 Application of marking material for test. All type I and type II marking materials for
application for test shall be covered on the face side with low tack, translucent transfer sheet to minimize
stretching of elastomeric material during application. The protective liner shall be removed from the adhesive
prior to application. All type I materials shall be carefully set in place. Starting at one end of each panel and
securing contact progressively toward the other end while avoiding wrinkling and entrapment of air under film,
and shall be rolled down with two passes of the hand operated, rubber-covered roller described in ASTM
D2860/D2860M (except that an alternate roller having a width of 2.5 ± 0.1 inch, a total diameter of 3.25 ± 0.1
inch and a hardness (Shore Scale A) of 70 to 80 may be used) at a roller speed of 12 inches per minute. Type
II and type III materials shall be applied with application tools and techniques as recommended by the
contractor in the furnished instructions. Once in place, the translucent transfer sheet shall be removed, the
marking materials shall be re-rolled or re-squeeged to ensure good edge adhesion, and then the marking
materials shall not be moved.
4.6
Method of inspection.
4.6.1 Color. The marking material shall be applied to bare metal as specified in 4.5.2.1. The color
shall be compared to the specified standard color in accordance with ASTM D2244. When differences in gloss
of the test panel and the standard color so as to interfere with the color comparison, a clear, colorless
overcoating of compatible lacquer or varnish, or other liquid of suitable matching gloss, may be used on the test
sample.
4.6.1.1 Gloss. The marking material shall be applied to bare metal as specified in 4.5.2.1 and tested
for gloss in accordance with ASTM D523.
4.6.2 Liner removability. Two 6 by 20 inch pieces of the marking material shall be used to determine the liner
removability. The liner shall be stripped from each specimen by hand and it shall be noted if the liner breaks or
tears, if it delaminates the adhesive from the backing, and if the stripping results in distortion of the marking
material.
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