Has anyone seen a “thermark for wood”, or otherwise stumbled onto one? Something you can apply to wood to make the engraves darker? Is there a type of finish that would achieve this?
I’m half tempted to try a sugar-based solution (as I think it’d burn really dark), but the water would make the wood fibers get all swollen, and that’s bad news. A uniform coating of sugar powder is a terrible idea, air assist would be a catastrophe.
A google search yielded the following of interest:
(Paulownia wood. Anyone tried yet? @mhumphrey ?)
A guide to how different wood types engrave. No telling how expensive or rare these are.