Scratchboard, also known as scraperboard, originated in Britain and France in the early 1900's. It is a very distinct look, in which artworks are created by using carving tools to etch and scrape away the surface of the board. Since you are carving into a thin layer of white China clay that is coated with black India ink, the "drawing" looks like white lines on a black surface when you are finished. This is a very fun method and we recommend it to anyone who wants to expand their horizons!
Sealing and Finishing Scratchboard Art
Seal finished Scratchboard art with a spray fixative like Krylon® UV Resistant Clear Coating or use the Krylon® UV Archival Spray Varnish. The fixative [or spray varnish] will dissolve fingerprints or smudges and will protect the surface from dirt and moisture. For best results, first remove all loose dust and debris from the surface with a soft brush. Then, spray with 2 - 3 coats [as directed on can] in a warm, well ventilated environment during low humidity.