This is a scratchboard, a clay covered hard board with a layer of black ink. When you scratch with a sharp tool you make a white mark. This is something I teach my high school art students every year, but I have never completed a scratchboard myself. So. . . . . finally I admitted this to my students. They challenged me and gave ME a due date. Mine was late but at least I finished. I like to draw, so it was a fun project. If anyone is interested in instructions for scratchboard visit my blog (janispaints.blogstpot.com). I posted some instructions for friends and students.