Then go to town! Well, actually, don't go crazy as it will splodge. But this is the fun part. Carefully place your apple on the fabric (make sure there is newspaper inside the bag so that it doesn't print through to the other side - been there, done that) and squish down hard, rocking the edges and pressing the stalk down too.
Carefully peel it back off and carry on until you have a pattern you like. This took a little while to dry, and it was a blustery day so I had to supervise, but now we have a printed laundry bag to match our colour scheme. Looking back over the posts, this is quite a monotone website... green anyone?