Foam Rubber as a stamp

Here are some examples of a batch of heavy cotton that were stamped using a wonderful sheet of packing foam rubber that had several different designs on it.  The foam was cut apart and, since it was fairly thick, was used as individual stamps without being glued to a support.  Interestingly, the foam did not absorb the wax very much and freely released it onto the fabric.

These pieces were all painted with Setacolor paint using sponges.  The red piece was folded in 4, then stamped, unfolded and painted.  


I have no idea where my friend got this foam, but I'd sure like to find out!  lol