High Volume Low Pressure, or HVLP, paint weapons are well-liked for making use of 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 decrease pressure works well with oil-based paints and finishes but presents some obstacles when utilizing 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 should be thinned earlier than it is useful as a spray finish. Insufficient thinning results in the paint popping out of the spray gun in unpleasant blobs or not at all. Thin the paint with water and mix well earlier than spraying. The amount of water required varies with the model and high quality of the paint. Start by thinning the paint by adding 10 % water and mixing thoroughly. If the paint remains to be too thick, add a small quantity of water and mix again. Do not use more than 25 percent 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 circulate without 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 a typical HVLP nozzle is 1.4 millimeters and might be clogged with very small bits of debris. Once the nozzle is plugged, you will have to take the gun aside and clear the obstruction. This is a messy procedure that can be avoided by using a strainer. In case you can not locate a paint strainer, pantyhose make a superb substitute.
Hose Size
The turbine blower on an HVLP paint gun produces heat that’s fed directly to the paint when utilizing a brief hose. Heating the paint reduces the drying time which impacts its ability to flow 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.
Technique
Hold the gun no more than eight inches away from the surface you are painting. Begin on the prime on vertical surfaces. For horizontal surfaces, start along either edge and work your way toward the opposite edge. Fully wet the surface of a piece earlier than moving to the next.
Test and Apply
A number of factors are concerned in getting the paint to the appropriate viscosity. Temperature, humidity, turbine output and the physical characteristics of the paint all affect the paint’s ability to flow smoothly. Getting the correct mix to your state of affairs is a matter of trial and error. The very best 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 method on the testing surface till you achieve a constant finish. Wasting a small quantity of paint training is less expensive and time-consuming than removing a bad paint job and starting from scratch.
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