Not all powders are created equal. Custom powder coating formulas can be quite complex including multi-flake metallics, pigments, etc. Therefore, it's import to have a good understanding of not only spray gun settings, but also the characteristics of the various spray gun nozzles. To receive the best results there are several factors as an applicator you should consider in order to be assured your finished product will turn out successfully. One of these critical factors is the gun-tip or nozzle (if applicable). Selecting the wrong nozzle for the given job can mean the difference between having a happy customer or having one that brings you grief.
These images above show how choosing the right gun-tip for your specific application is extremely important. This high-volume metallic flake wrinkle finish needs the right gun settings and gun tip to reach the desired results.
This image shows the difference in final outcome utilizing three common gun tips. The powder is from the same bag utilizing the same 55 KV setting and air pressures. Of course, using our fluidized hopper also gives you the best chance for success, especially when applying non-bonded metallic powders.
The image below is after applying Treasure Island PMB-10348. The same 55 KV setting and air pressures. The Cross tip versus Conical tip with a difuser and application thickness measures virtually the same at 2.3 mils and 2.1 mils, respectively. As you can see, a much better metallic flake application using the conical tip, thus changing the overall color.
It's important that an applicator is aware of these factors and sprays a test piece before committing part(s) to the project.
The below image illustrates the difference between 100KV charge potential compared to a 50KV charge potential. This affects non-bonded metallic powders alike, especially ones with a dense metallic flake.
