Gradient Glass Palette with Value Scale

12 by 16 inch Gray backed Value Scale Glass Palette for Oil Painting with Gray-scale Gradient. Value Scale Palettes can help artists with color mixing by providing a value reference used to compare color mixing. Made with 3/16 tempered glass with a pencil edge polish for safe handling. Easy to Clean, just use artists solvents and a palette knife. If the paint dries on the palette, no problem! Use a new one-sided razor blade to clean off dried paints. (please be careful). Visual Calibration tool for Artists. Patent Pending