Scratchboard is a unique artform where the image is engraved directly into the board. Scratchboard consists of a 1/8" masonite panel that is coated with a layer of white clay which is then coated with a fine layer of india ink. A sharp tool, such as an x-acto knife or scalpel is used to carefully remove the ink layer to reveal the clay beneath. Other abrasive materials, such as sand paper and fiberglass brushes can also be used to achieve a wide range of effects. Each scratchboard piece consists of tens of thousands of small cuts or scratches which are layered upon one another to create a sense of depth and tone. Once the entire piece has been scratched out, it can be toned by applying ink either with a paintbrush or an airbrush. Black ink can be added and then the piece can be re-scratched in key areas to achieve an expanded tonal range, or the piece may be colored using watercolor. Finished works are sealed with a satin-finish fixative to prevent further scratching of the board. Scratchboard is archival, just like other art mediums, and can be framed with or without glass.