Borosilicate Glass Engraving

Information

      Made this Valentine Glass for my Daughter who will soon be an SLP.  It took me two glasses to get the etching right.  I used black tempura paint as the coating for the glass.  I tried spray paint options, but they didn't seem to turn out as well.  I had the glass in the chuck to turn it.  Luckily, there are no other marks on the glass, so it didn't matter how it was centered.