If you only knew how many experiments it took to find the best product to make metal leaf tarnish. FYI - the silver leaf is made out of aluminum so it won't. It must be a gel bleach pen for the best result. Write or draw on the metal leaf with the pen then wait 1-4 hours depending on the look you want. Wipe off the bleach with a damp rag and you will see that the bleach ate through the metal leaf to the underlying surface.