Harley Davidson copper and black engraving

Information

      For the black engraving, I used a mix of 1 jar of titanium dioxide, 3 jars of alcohol, and 4 drops of food coloring. And for the "gold" copper engraving, I used 1 jar of copper powder, 5 jars of water, and 1 jar of yellow Tempera Paint. The settings on my Xtool S1 were: first engrave the copper at 30% power and 93-160 strokes, and for the black engraving, at 50% power and 220-160 strokes. It's best to place the tile in a jig or in a way you think is best, so that you can put the tile back in the same place after the first engraving. Good luck, I'll also link to someone who has done it too, engraving gold.