MIL-HDBK-1110
prepared for painting, free from dirt, oil and grease, other
surface contaminants, and from loose, peeling, or poorly bonded
paint. If removing lead-containing traffic marking paints (e.g.,
some yellows), environmental and worker safety regulations apply.
Refer to Section 3 for more information.
When airfield markings are to be reflectorized,
TT-B-1325, Type III beads are applied immediately after spray
application at the rate of 10 pounds per gallon of paint.
Roadways are reflectorized with TT-B-1325, Type I beads applied
at the rate of 6 pounds per gallon of paint. In both cases, any
more beads would have insufficient paint available to be
retained. Type I beads have a much lower specific gravity than
Type III beads.
For marking pavements, striping machines (specially
equipped trucks) are used. They have tanks that hold large
quantities of paints and beads. Striping machines for airfields
have arrays of multiple spray gun and bead dispensers and
necessary power and support equipment to apply long painted lines
3 feet wide. The spray guns and dispensers are adjusted to give
a uniform paint thickness and bead density across the entire
width of the marking.
5.20.1.4 Inspection of Marking Operation. Inspection procedures
for monitoring contracts for striping airfields are distinctly
different from other painting inspections. They are presented
below in the general order in which they might be used.
a) Procedure 1: General Appearance of Paint and
Beads. Visual examination of paint in the can and beads is done
to check for any apparent deficiencies. Products with apparent
discrepancies should receive a laboratory analysis or be
replaced. Product labels should also be checked to verify that
they are the ones specified. Paints must be homogeneous in color
and consistency. They should be stirred to assure that they are
free of settling, skinning, caking, strings, and foreign bodies
and have a viscosity suitable for spraying. Method 3011.2 of
FED-STD-141, Paint, Varnish, Lacquer, and Related Materials:
Methods of Inspection, Sampling, and Testing describes precisely
how to check for "Condition in Container."
Beads must be clean,
dry, free flowing, and free of air intrusions. They should be
only a few extremely large, small, or out-of-round beads. Type I
beads have a pure white color; Type III beads have a brownish
cast.
b) Procedure 2: Sampling of Paint and Beads. Paints
and beads may be sampled for immediate analysis or merely taken
for later use, if problems arise later. In any event, it is
necessary to procure samples that authentically represent the
material to be applied to the pavements. Incompletely cleaned
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