Shot Glass

I use the Xtool F1 machine with the RA2 rotary device. I use a black tempera paint. Two coats to completely cover the glass before laser engraving. Any streaks in the glass that you can see through could result in the laser not penetrating the glass. I run it at 700 DPI, 700 dot duration. Takes about 10 minutes per shot glass, but I feel this gets you the best results.