Is it possible to engrave through 3 coats of polyurethane into end grain silver maple? I have an Ortur laser 2 running at 10 watts max power. What settings are suggested?
From what I can tell, if you can see through it, it’s likely, with a visible laser, you can lase through it. It really depends on the properties of what you’re lasing through.
Second, if you do lase it, where do you expect the debris to go? This is a burning or vaporizing operation, it has to go somewhere.
I’ve never tried this,so I’ll leave it to others that may have tried it.
Good luck
I am thinking that the polyurethane will also be lased.
I guess you’d have to try it and see what happens. I thought it was pretty clear, so usually a visible light laser won’t mark it.
I’ve seen them cut polyurethane foam, but not a coating of it on wood.
Let us know what you find out…
C02 laser has absolutely no issues with that. I am not sure about a 10 watt diode.
I do suggest to use a masking around the engraving to keep your lines clean.
The poly can make some debris that can stick to the surface.
Apply painters tape masking and burn through that, then peel after.
I am not either, for clear urethane. However, I have lased through clear epoxy to wood for a customer. The result looked like I burned it first and then put the epoxy on top. The engraving was clearly visible through the epoxy. I would expect the same with polyurethane.
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