I printed a construction fence over a drop cloth I had been using for probably a dozen pieces. My main reason for having a drop cloth is because the fabric paint soaks through the main fabric, and sticks to the cardboard I have below it. Its hard to separate them with out getting pieces of cardboard that I can't remove from the fabric. I now try to remember to have another piece of fabric under my main fabric to soak up the extra paint, as well as to possibly become a new piece on its own.
Here is the back of the same piece of fabric.