I use this to do acid etchings.
Print your design with a laser printer on glossy (inkjet or
magazine) paper or PnP paper, Clean your metal with steel wool and
denatured alcohol, and lay your design on top of it. Wrap it in
aluminum foil and run it through a laminator for about 2 minutes.
If you used glossy paper, unwrap it and let it sit in water fro 15
Carefully rub off the paper. The toner will have adhered to the
PnP paper will roll right off.