Bright Red Matte Ink Underglaze is a deep crimson color that is vivid at cone 05, darkens slightly at cone 5, and becomes a deep cherry red at cone 10. A clear glaze deepens the color. Like an underglaze, this Bright Red Matte Ink fires to a matte finish that requires a clear glaze to be considered food-safe. Too thick of an application of the ink may result in a glossy finish. Cones 05-6.