High Volume Low Pressure, or HVLP, paint guns are common for applying paint indoors. The low pressure used to draw the paint out of the gun significantly reduces the quantity of over-spray produced by traditional compressed air paint guns. This decrease pressure works well with oil-primarily based paints and finishes however presents some obstacles when using thicker, heavier latex paint. These obstacles will be overcome with a bit of additional equipment and paint preparation.
Paint Preparation
Quality latex paint is significantly thicker than traditional finishes and must be thinned earlier than it is useful as a spray finish. Inadequate thinning leads to the paint coming out of the spray gun in ugly blobs or not at all. Thin the paint with water and blend well earlier than spraying. The amount of water required varies with the brand and high quality of the paint. Begin by thinning the paint by adding 10 percent water and mixing thoroughly. If the paint continues to be too thick, add a small amount of water and blend again. Don’t use more than 25 percent water in any paint. Extreme thinning reduces the paint’s ability to adright here to and cover a surface.
Additives
When thinning alone doesn’t work, use a latex paint conditioner to lower the viscosity. Latex paint conditioners are designed to improved the paint’s ability to stream with out thinning the paint and impairing its ability to stick to and cover a surface.
Straining
Use a standard cone paint strainer when filling the paint gun cup. The opening on a typical HVLP nozzle is 1.four millimeters and can be clogged with very small bits of debris. As soon as the nozzle is plugged, you will have to take the gun apart and clear the obstruction. This is a messy procedure that may be avoided by utilizing a strainer. For those who cannot locate a paint strainer, pantyhose make a good substitute.
Hose Length
The turbine blower on an HVLP paint gun produces heat that’s fed directly to the paint when using a brief hose. Heating the paint reduces the drying time which affects its ability to circulate and level out. Adding a six-foot part of air hose between the gun and the turbine reduces the working temperature of the air atomizing the paint and alleviates this problem.
Technique
Hold the gun no more than eight inches away from the surface you’re painting. Begin at the high on vertical surfaces. For horizontal surfaces, begin along either edge and work your way toward the opposite edge. Totally wet the surface of a bit earlier than moving to the next.
Test and Apply
Several factors are involved in getting the paint to the correct viscosity. Temperature, humidity, turbine output and the physical traits of the paint all have an effect on the paint’s ability to movement smoothly. Getting the right mix for your state of affairs is a matter of trial and error. One of the best approach is to test spray the paint on a chunk of cardboard or scrap each time you thin it. After getting a combination that flows smoothly, follow your spraying approach on the testing surface until you achieve a constant finish. Losing a small amount of paint practicing is less expensive and time-consuming than removing a bad paint job and starting from scratch.
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