High Volume Low Pressure, or HVLP, paint weapons are widespread for applying paint indoors. The low pressure used to draw the paint out of the gun significantly reduces the amount 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 can be overcome with a bit of additional equipment and paint preparation.
Paint Preparation
High quality latex paint is significantly thicker than traditional finishes and must be thinned before it is useful as a twig finish. Insufficient thinning leads to the paint popping out of the spray gun in unsightly blobs or not at all. Thin the paint with water and mix well earlier than spraying. The amount of water required varies with the brand and quality of the paint. Start by thinning the paint by adding 10 p.c water and mixing thoroughly. If the paint remains to be too thick, add a small quantity of water and blend again. Don’t use more than 25 % water in any paint. Excessive thinning reduces the paint’s ability to adright here to and cover a surface.
Additives
When thinning alone does not work, use a latex paint conditioner to lower the viscosity. Latex paint conditioners are designed to improved the paint’s ability to stream without thinning the paint and impairing its ability to stay to and cover a surface.
Straining
Use an ordinary cone paint strainer when filling the paint gun cup. The opening on a standard HVLP nozzle is 1.four millimeters and might 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 prevented by utilizing a strainer. For those who can not locate a paint strainer, pantyhose make a superb substitute.
Hose Length
The turbine blower on an HVLP paint gun produces heat that’s fed directly to the paint when utilizing a short hose. Heating the paint reduces the drying time which affects its ability to circulation and level 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.
Approach
Hold the gun no more than eight inches away from the surface you are painting. Start on the top on vertical surfaces. For horizontal surfaces, start alongside either edge and work your way toward the opposite edge. Fully wet the surface of a piece before moving to the next.
Test and Practice
A number of factors are concerned in getting the paint to the fitting viscosity. Temperature, humidity, turbine output and the physical traits of the paint all have an effect on the paint’s ability to stream smoothly. Getting the right mix to your scenario is a matter of trial and error. The most effective approach is to test spray the paint on a chunk of cardboard or scrap every time you thin it. After you have a mixture that flows smoothly, apply your spraying method on the testing surface till you achieve a constant finish. Wasting a small quantity of paint training is less costly and time-consuming than removing a bad paint job and starting from scratch.
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