TB-43-0209
DEPARTMENT OF THE ARMY TECHNICAL BULLETIN
COLOR, MARKING, AND CAMOUFLAGE PAINTING OF MILITARY VEHICLES, CONSTRUCTION EQUIPMENT AND MATERIALS HANDLING EQUIPMENT
OCTOBER 1990
CHANGE 1
TB-43-0209 - Page 42 of 406
TB 43-0209
Figure 32.
Applying Pattern with Chalk.
29. CAMOUFLAGE PAINTING
WARNING
The local safety office and preventive
medicine support activity must be
consulted prior to initial CARC
painting.
The paints and thinners to be used in pattern painting are
to be obtained through normal supply channels. Pattern
painting will begin upon receipt of the necessary pattern
designs and paints. Use the equipment and procedures
described in TM 43-0139 to accomplish the painting.
30. TECHNIQUES OF MIXING AND THINNING
a.
Method.
The best, quickest, and easiest method of painting is by
spraying. Paint rollers are used on large surfaces when
spraying is impractical. Paints are brushed on when
other methods are impractical or special equipment is
not available.
In general, the use of brushes is confined to touchup
jobs.
b.
Readiness.
In most cases, paints are issued ready mixed. Hence
color blending is not required. CARC paints MIL-C-46168
and MIL-C-22750, however, are issued in a two-
component form and require accurate mixing techniques.
c.
Preservation.
(1)
Stirring. Stir paints well before use. If the
liquid portion (vehicle) has separated from the pigment,
pour off
most of the liquid portion into a clean container. Stir the
thick settled portion (pigment) in the bottom until all
chunks are softened and dissolved. Restore the poured
off portion a little at a time, stirring constantly with a lifting
and beating motion.
"Box" the paint thoroughly by pouring it from one
container to another several times, stirring the paint for a
few minutes between each transfer.
NOTE
Do not "box" lacquer, as this will
cause a loss of the liquid portion by
evaporation.
(2) Straining. When paint stands over a period of
time, a skin may form over the surface and the pigment
may form into chunks to the extent that stirring will not
mix all of the ingredients properly. In such cases, strain
the paint through a strainer into a clean container,
discarding the residue left in the strainer. Do not strain
CARC coatings, however. CARC coatings which cannot
be properly mixed will be resealed and disposed of as
hazardous wastes.
(3) Thinning.
(a)
When it is necessary to thin paint, use a
small amount of the prescribed thinner. Because of its
volatility, thinner will evaporate from the paint film,
leaving practically the same ratio of vehicle to pigment
per square foot of surface as the paint would have
provided before thinning. The warmer and drier the
weather, the less thinner is needed because heat tends
to thin it. More thinner is required in cold weather to
hasten the drying and hardening of the film. Thinner
should be used with care, as the less used, the more
durable the applied coat will be.
(b)
Polyurethane coatings may be thinned up to
20 percent by volume with thinner MIL-T-81772, Type I,
or with the manufacturer’s recommended thinner. Epoxy
primers which are blended (admixed) four to one by
volume, such as MIL-P-52192 and MIL-P-53022, may be
thinned up to 20 percent by volume with epoxy thinner
MIL-T-81772, Type II.
Epoxy enamels and primer which are blended one to one
by volume, such as MIL-C-22750 and MIL-P-23377,
usually have satisfactory spray viscosities, but may be
thinned with small amounts of MIL-T-81772, Type II, if
necessary. Water is used to thin MIL-P-53030.
(c) Paints which contain a slow-drying vehicle may
require additional thinner.
37
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