Double-action airbrushes allow control and variation of the spray pattern
during each stroke. Two separate finger actions control the spray pattern of
double-action airbrushes. The first action is to depress the finger lever
releasing air only. The second action is to pull the finger lever back
releasing pigment. Pulling the lever further back releases more pigment and
enlarges the spray pattern. Increasing or decreasing the distance between the
airbrush and the paper surface will also vary spray pattern. The double-
action airbrush, sometimes called a pencil brush, is a good general-purpose
Figure 6-3 shows the parts of a double-action airbrush.
Figure 6-3.Parts of a double-action airbrush.
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