Scratchboard is a 2-dimensional subtractive art form. The scratchboard is 1/8th of an inch in thickness, made of a masonite base covered in smooth absorbent white kaolin clay and coated with black India ink. An assortment of sharp and abrasive tools such as blades, scalpels, fine steel wool, tattoo needles, etc., are used to scratch away the black ink, revealing the white surface below. Highly detailed textures can be achieved precisely and evenly. Colored scratchboard inks and other mediums can be added to the white areas and then re-scratched to create additional highlights and volume for added dimension. Clayboard is an un-inked surface with a hardboard support on which color can be thinly applied and then scratched.
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