Related Clues:

• Artist's medium
• Painting base
• Plasterlike preparation
• Tempera painting surface
• Gypsum painting surface
• Artist's material
• Medium in a tube
• Plaster of Paris relative
• Plaster finish
• Bas-relief medium, perhaps
• Painter's primer
• Oil painting primer
• Painter's undercoat
• Painter's base layer
• Plaster surface