Airbrushes, ContinuedDouble-actionDouble-action airbrushes allow control and variation of the spray patternairbrushesduring each stroke. Two separate finger actions control the spray pattern ofdouble-action airbrushes. The first action is to depress the finger leverreleasing air only. The second action is to pull the finger lever backreleasing pigment. Pulling the lever further back releases more pigment andenlarges the spray pattern. Increasing or decreasing the distance between theairbrush and the paper surface will also vary spray pattern. The double-action airbrush, sometimes called a pencil brush, is a good general-purposebrush.Figure 6-3 shows the parts of a double-action airbrush.Figure 6-3.—Parts of a double-action airbrush.Continued on next page6-5
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