Making airbrush art is one of the most prominent hobbies to modern day artists. Instead of using the conventional type of paint brushes, they use equipment called the airbrush. Airbrush is a modern painting tool, usually a small spray gun that is operated by air and by the process of nebulization.
The latest type of air brushes uses air compressors to generate air for the spray gun. There also many uses or air brushes. You can use it for making art and illustrations, photo retouching, coating firearms, murals, hobbies, make up application, temporary tattoos, airbrush tanning, finger nail art, clothing and automotive.
An airbrush works by passing a stream of compressed air through a venturi that makes a local reduction in air pressure that pulls up the paint from a connected paint container at normal atmospheric pressure. The speed of the air atomizes the paint and changes it into very little paint droplets that spreads out from the airbrush nozzle. The volume of the paint can be controlled by a trigger. There are two types of airbrush triggers.
The first type of an airbrush trigger is the single action trigger. It is also known as this simplest and cheapest of the air brushes. When you press a "single action trigger", the paint and air flows into the airbrush and the tiny bits of paint are sprayed on the target surface. The technique for a single action trigger can only execute one action for the procedure.
Single action of activating the trigger releases a specific percentage of paint to air. To change the different line width, you may change the size or style of the tip of the nozzle or you can modify the spray volume manually until you get the desired width. A technique that suits a single action trigger is you must keep your hand moving before and after you let go of the trigger so you can avoid some "bar bell lines".
Second type of an airbrush trigger is the double action trigger. It separates the air and the paint when painting. It uses different mechanism for both paint and air. With this, the painter could adjust the volume of air and paint for specific artistic styles. Unlike the single action trigger, this type is much harder to use since you need to operate two systems. It is also much expensive than the first type. A technique for using this is to begin and end with air only.
Another mechanism that an airbrush uses is the feed system. Feed systems are responsible for loading the paint into the airbrush. There are also different types of feeding system for an air brush. The first one is called the gravity feed. In this setup, the paint container is placed on the top of the air brush and uses gravity to load the mixing chamber.
It requires less air pressure for suction. Most of the time, instruments with finest atomization and detail requirements uses this method. Bottom feed and side feed are the other methods of feeding systems. A bottom feed airbrush usually can accommodate huge paint volume but requires more air pressure to load paint into the mixing chamber. Since it holds more paint, it is mostly used for large projects like automobile and t-shirt painting. Another advantage of this feed is more access for the painter on the top of the airbrush. Side feeds are useful for the right and left handed to suit their preferences.
Another part of an airbrush is the mixing point. With an internal mix airbrush the paint and air mixes inside the tip of the airbrush creating a finer atomized mist of paint. In an external mix, the air leaves the airbrush before it comes into contact with the paint which creates a coarser stippled effect. External mix airbrushes are much cheaper and more appropriate for covering bigger areas with more thick paints or varnishes.
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