Several people asked "how'd you do that?" and my answer, as always,was "I have no idea."
But this afternoon, as I was going through the zillions of photos in iPhoto, deleting many of them, I discovered photos I took as I was working on this piece in 2011. Just in case you are interested in seeing the progress, here are the pictures. Freezer paper, masking tape, and thermofax with thickened dyes.