Step 1 : Introduction to the question "5. Why do stained glass artists grind the edges of the cut pieces of glass?"
...1. To adjust the fit of the piece in the project 2. To keep from cutting themselves when working on the piece 3. All of these 4. To allow the copper foil to stick to the edges of the glass When I first started making glass, I relied heavily on the grinder for adjustments in piece shape. After many years of practice I now use the grinder merely to rough up my edges.