ive used receipts to roll j's before and it works fine. you have to somehow hold the paper together while you run the lighter over it, but it works. i dunno about the ink but it didnt fuck me up too bad or anything. rive also used a reciept that had no ink on it, it was just like the bottom of a receipt that i tore off. and for the tin foil issue you could just carry tin foil in ur jacket, or a peice