Why are gravity-feed or siphon-type spray guns commonly used today?

Gravity-feed or siphon-type spray guns are commonly used today because they are more efficient and economical. This efficiency arises from their design which allows paint to flow smoothly and consistently into the spray nozzle, minimizing waste. The gravity-feed system utilizes gravity to assist in the delivery of paint, reducing the need for excessive air pressure. This not only enhances the atomization of the paint but also allows for a more controlled and precise application, improving the overall quality of the finish.

In contrast, other options do not align with the advantages of gravity-feed or siphon-type spray guns. High levels of air compression can lead to inefficiencies and increased operational costs, while less ergonomic designs would detract from user comfort, which is crucial in a field that requires prolonged use of equipment. Producing thicker paint layers is not a primary characteristic of these guns; rather, they are favored for producing smooth finishes with uniform coverage, demonstrating their efficiency and effectiveness in painting applications.