While I work on a series of mail art pieces I often have them all taped down to a piece of cardboard. Over time, layer upon layer of paint that spills over the edges builds up. I reuse the cardboard many times. This week it was time to recycle a piece of cardboard (see below). What better way to do it, then to cut it up and turn the pieces into postcards? This series of 18 is going out today.