American Crow on claybord I love crows, they have been some of my favorite birds to rescue. Their intelligence is always amazing. This one was based of a picture I had of a crow I rescued a few years ago. A little more about claybord or Scratchboard...is a white clay coated hardboard panel that has been coated with India Ink. The clay surface allowes you yo expose the white clay underneath while adding contrast, tone value, and fine detail. Claybord the the highest quality scratchboard on the market. It's durable wood backing prevents tearing or bending. Artwork has been coated with claybord fixative and is ready to frame (without glass)