MIL-DTL-43719D
3.5.2 Markers. Markers shall be supplied in the form of letters, numerals, letter and numeral kits,
legends, symbols or hazardous material symbols, as covered in the applicable detailed specification sheet, or
as otherwise specified by the procuring activity (see 6.2 and 6.4).
3.5.2.1 M113 marking materials. When specified (see 6.2) the marking materials for the
M113/A1/A2 armored, full tracked, personnel carrier vehicle family, shall conform to the requirements and
testing of the type I, class 1, and the additional requirement cited in Army Tank and Automotive Command
Drawing 11677932.
3.6 Thickness. After removal of liner and any transfer sheets or other tapes, marking materials
shall have maximum thicknesses as follows (see 4.4.2.5):
Class 1, not screen processed
-
0.0055 inch
Class 1, screen processed
-
0.0075 inch
Class 2, not screen processed
-
0.0060 inch
Class 2, screen processed
-
0.0080 inch
Performance.
3.7
3.7.1 Breaking strength. The marking materials shall have a minimum breaking strength of 5.0
pounds per inch of width when tested as specified in 4.4.2.5.
3.7.2 Elongation. The marking materials shall have an elongation of 25 percent minimum initially,
and 15 percent minimum after the one year storage period when tested as specified in 4.4.2.5. In either case,
however, the elongation shall exceed 15 percent at 5 pounds force.
3.7.3 Shrinkage. When tested as specified in 4.4.2.5, the shrinkage in length or width shall be 1/16
inch maximum for class 1 marking material and 1/8 inch maximum for class 2 material.
3.7.4 Free film flammability. The marking materials shall not be completely burned in 15 seconds
when tested as specified in 4.4.2.5.
3.7.5
Flexibility.
3.7.5.1 Room temperature. The marking materials shall not show a break, crack, or delamination
after 20 folds at room temperature when tested as specified in 4.4.2.5.
3.7.5.2
Low temperature. The marking materials shall not crack when tested as specified in 4.4.2.5.
3.7.6
Adhesion.
3.7.6.1 Class 1, at room temperature. Twenty-four hours after application, class 1 marking material
shall have an average adhesion over bare and painted metal surfaces of not less than 50 ounces per inch of
width for types I and III, and not less than 35 ounces per inch of width for type II, when tested as specified in
4.4.2.5.
3.7.6.1.1
Class 1, type II only, at 34 °F. Class 1, type II marking material, applied to clean, dry,
bare, and painted metal surfaces at 34 °F shall have sufficient initial adhesion to produce tearing of the marking
material when removal is attempted, when tested as specified in 4.4.2.5.
3.7.6.2 Class 2, type I and II. Twenty-four hours after application, marking materials shall have an
average adhesion over bare and painted metal surfaces of not less than 15 nor more than 65 ounces per inch
of width, when tested as specified in 4.4.2.5.
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