If I may add just a couple of things. Use a large piece of plexiglass standing up toward the back of your sink. Have the running water in a hose in one hand and the brush or a small cotton pad in the other. You want to keep water running on the print underneath the place where you are working, and also rinse it off frequently. Once you mix the bleach, is dissipates rapidly, probably within ten minutes, so only mix a small amount at a time. If you are going to try it, make several extra prints and be prepared to toss them as you learn. It can also be helpful in the shadows. Good luck. Tom Perkins