Sculptors turn to this clay because it allows them to carve, tool and detail with none of the blurring and bending found in softer polymer clays. The extra-firm sculpting clay is gray in color, making it easy for both sculptors and photographers to see even the tiniest detail and, when necessary, catch it on film. After curing in the oven, this clay can be sanded, drilled, carved and painted with water-based acrylic paint. Details: Gray 1 lb. (454 g) Perfect texture for sculpting fine details Shatter and chip resistant Professional quality oven-bake clayInstructions:Bake at 275°F (130°C) 15 minutes per 1/4" (6 mm) thickness. Do not exceed the temperature or recommended baking time.