A granular paste containing fine particles of black flint allowing the artist to achieve a heavier and more pronounced effect than can be achieved with Mineral Texture Gel. Stir well before use. Use alone for colorless results or mix with acrylic color. Can be overpainted. To increase flow, mix with Winsor & Newton Gloss Medium. Do not over thin with water. Apply with a brush or knife and clean equipment with water after use.