I’m trying to create Instrument Dial Faces by Laser Etching off the top layer of Black paint to expose the White paint layer below. The clear plastic (acrylic) I’m using has been painted with 2-3 coats of Krylon 2X White Primer to provide a White under coat and that was followed by 1 coat of Krylon Flat Black paint.
I have tried setting the Raster Speed to 100% and the Raster Power down to as low as .001% and yet the Laser still seems to Etch through all paint layers and into the plastic several .001’s. (See below.)
It is more obvious when viewed from the back as you can see right through the White.
I don’t know if more layers of paint will solve the problem given how deep the Raster Etching seems to go. I may also try applying a masking layer through which I Etch (and thicker paint layers). Using that I can always spray the dial face with White and then remove the mask to (re)apply White paint into the Etched Face.
So at this point I’m looking for advice as how best to accomplish this Etching without burning through the White Layer.