Scraffito is when you scratch through the surface to expose another layer. We did this with a black underglaze that we painted onto a slab of clay fitted to a styrofoam plate. After the underglaze dried, we were able to scrape it off. I like the way mine turned out, I would probably do more planning next time. After making the design we wanted, we dipped it into clearglaze and it went into the kiln!