High Quantity Low Pressure, or HVLP, paint guns are in style 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 lower pressure works well with oil-based paints and finishes but presents some obstacles when utilizing thicker, heavier latex paint. These obstacles might be overcome with a bit of extra equipment and paint preparation.
Paint Preparation
Quality latex paint is significantly thicker than traditional finishes and must be thinned before it’s useful as a twig finish. Insufficient thinning ends in the paint coming out of the spray gun in unpleasant blobs or not at all. Thin the paint with water and blend well before spraying. The quantity of water required varies with the model and quality of the paint. Start 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 % water in any paint. Excessive thinning reduces the paint’s ability to adhere 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 move with out thinning the paint and impairing its ability to stick 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 could be clogged with very small bits of debris. As soon as the nozzle is plugged, you’ll have to take the gun aside and clear the obstruction. This is a messy procedure that can be prevented by utilizing a strainer. Should you can’t find a paint strainer, pantyhose make a very good 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 movement 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.
Method
Hold the gun no more than eight inches away from the surface you’re painting. Begin on the high on vertical surfaces. For horizontal surfaces, start alongside both edge and work your way toward the opposite edge. Totally wet the surface of a piece earlier than moving to the next.
Test and Follow
Several factors are concerned in getting the paint to the right 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 for your situation is a matter of trial and error. The most effective approach is to test spray the paint on a piece of cardboard or scrap each time you thin it. Once you have a mix that flows smoothly, apply your spraying method on the testing surface until you achieve a consistent finish. Wasting a small amount of paint practising is less costly and time-consuming than removing a bad paint job and starting from scratch.
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