MIL-PRF-61002B
4.2.5 Adhesion.
4.2.5.1 Apparatus. The apparatus shall consist of a holding fixture that will rigidly
support test panels with their label mounting surfaces in a vertical (or horizontal) position.
4.2.5.2 Preparation of test labels and test panels. Prior to testing, test labels and test
panels shall be conditioned for a minimum of 24 hours in an atmosphere maintained at
standard conditions (see 4.2.1.2). Style 1 test panels (stainless steel), as specified in ASTM D
3330, shall be cleaned with diacetone alcohol (non-residual, technical grade or better) using a
lint free absorbent material such as surgical gauze, wiped dry with fresh absorbent material,
and cleaned twice again with 95% methyl alcohol and fresh absorbent material. Style 2 and 3
test panels shall be wiped free of dust and other surface contaminates using lint-free absorbent
material, such as surgical gauze or equivalent material so as not to contaminate the test
specimen. Style 2 test panels shall utilize the Standard Reference Materiel 1810a, attached to a
rigid panel with double coated tape.
4.2.5.3 Method. Before removal from their release liners, each label shall be trimmed
lengthwise to 0.5 inch (12.7mm) width (if applicable). Place a 1-inch by 2-inch (25.4 mm by
50.8 mm) strip of paper/chipboard with a hole in one end for attaching a weight or equivalent, on
a cleaned surface of the test panel. Peel each test label from its release liner and gently place the
label, adhesive side down, on a test panel and over the 1 inch (25.4 mm) edge of paper/chipboard
such that approximately 1.125 inch (28.575 mm) of the label is in contact with the test panel and
the remaining length of test label is on the paper/chipboard and approximately centered with the 1
inch (25.4 mm) edge. Secure the test label to the test panels and paper/chipboard strips by rolling
each label once in each lengthwise direction with a steel, rubber-covered roller as described in
ASTM D 3330. If any bubbles or wrinkles appear on the label, discard it and replace it with a new
one using the same procedure. Place the panels with the labels on the bottom surface in the
holding fixture and gently attach a 25-gram +/- 1-gram weight to the free end of the
paper/chipboard strips such that the line of force of the 25-gram weight and the test panel form an
angle of approximately 90 degrees. The weight shall remain as a peeling force for 4 hours +/- 5
minutes.
4.2.6 Moisture/rain resistance.
4.2.6.1 Preparation of test labels. Test labels shall be prepared as specified in 4.2.1.3.
4.2.6.2 Method. The test specimens shall be immersed for 30 minutes, +/- one minute in
plain tap water. The water shall be maintained at a temperature of 120 degrees F, +/- 10 degrees F
during the soaking period.
4.2.6.3 Performance tests. Performance parameters shall be as specified in paragraph
3.15.2.
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