High Volume Low Pressure, or HVLP, paint weapons are popular for making use of 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 lower pressure works well with oil-based paints and finishes however presents some obstacles when using thicker, heavier latex paint. These obstacles might 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 before it is helpful as a sprig 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 mix well before spraying. The quantity of water required varies with the model and high quality of the paint. Begin by thinning the paint by adding 10 % water and mixing thoroughly. If the paint continues to be too thick, add a small amount of water and mix again. Don’t use more than 25 p.c water in any paint. Excessive 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 decrease the viscosity. Latex paint conditioners are designed to improved the paint’s ability to flow with out thinning the paint and impairing its ability to stay to and cover a surface.
Straining
Use a normal cone paint strainer when filling the paint gun cup. The opening on an ordinary HVLP nozzle is 1.four millimeters and may be clogged with very small bits of debris. As soon as the nozzle is plugged, you’ll have to take the gun apart and clear the obstruction. This is a messy procedure that can be averted by utilizing a strainer. If you happen to can not locate a paint strainer, pantyhose make a great substitute.
Hose Size
The turbine blower on an HVLP paint gun produces heat that is fed directly to the paint when utilizing a short hose. Heating the paint reduces the drying time which impacts its ability to move and stage out. Adding a six-foot section of air hose between the gun and the turbine reduces the working temperature of the air atomizing the paint and alleviates this problem.
Method
Hold the gun no more than eight inches away from the surface you might be painting. Start on the high on vertical surfaces. For horizontal surfaces, begin along both edge and work your way toward the opposite edge. Totally wet the surface of a bit before moving to the next.
Test and Observe
A number of factors are concerned in getting the paint to the suitable viscosity. Temperature, humidity, turbine output and the physical traits of the paint all affect the paint’s ability to movement smoothly. Getting the right mix on your situation is a matter of trial and error. The perfect approach is to test spray the paint on a bit of cardboard or scrap every time you thin it. After you have a mixture that flows smoothly, observe your spraying technique on the testing surface until you achieve a constant finish. Wasting a small amount of paint working towards is less expensive and time-consuming than removing a bad paint job and starting from scratch.
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