Just a test on a mirror. 100mm x 100mm mirror, 6000mm/min, 90% power, 0.05 interval. I ran this FACE UP.
So hard to take pictures of mirrors… 
Absolutely blasted the backing off of the mirror. Used the aluminum cards to keep from etching it into my laser bed.
Looks great.
Thanks for including settings.
Did something similar with the co2 and they are 12" square mirror tile. Used black or red paint after I lased off the mirror coat.
Would love to get a CO2, lack the funds and place to put it.
I think it’s kind of like a boat… great fun, but a money pit 
