Durable tile marking with iron oxide

[derrick.westoby]

This is the best post I’ve seen on here! Thanks for the post and preemptively answering great questions.

[caribis2]

@shop

is there a particular reason you recommend against them? she tested red copper oxide, black iron oxide, black copper oxide, cobalt oxide, nickel oxide, chrome oxide, red iron oxide, black nickel oxide

Both copper and chrome are supposed to be reflective to the IR wavelength of our glowforges. Reflective in oxide form? I have no idea.