Single-action airbrushes

Illustrator Draftsman 3 & 2 - Volume 3 Executionable Practices
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Airbrushes, Continued Single-action airbrushes The single-action airbrush, sometimes known as a poster brush, is simple in design. With single-action airbrushes, downward pressure on the finger lever releases the flow of air and paint. Some models of single-action airbrushes allow adjustment of the nozzle to regulate the amount of fluid flow. You may also adjust the finger lever to regulate the amount of air passing through the airbrush. These airbrushes work well for simple illustrations and large backgrounds. Single-action airbrushes may use heavy- bodied pigments such as tempura or casein. Figure 6-2 is an example of a single-action airbrush. Figure 6-2.—Adjustments on a single-action airbrush. Adjust the spray pattern of single-action airbrushes before use. After adjustment, only increasing and decreasing the distance between the airbrush and the paper surface will vary the spray pattern. To adjust single-action airbrushes: Step Action 1 Turn off the fluid control at the nozzle. 2 Hold the airbrush ½ inch in front of a scrap of paper. 3 Depress the finger lever and slowly open the nozzle (fluid control) until a wisp of color appears. 4 To make the spray pattern wider, continue to open the fluid control. Continued on next page 6-4

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