Jet Black Matte Ink is a cool black color that is smooth and velvety at cone 05, darkens at cone 5, and becomes darkest black and slightly glossy at cone 10. A clear glaze deepens and accentuates this ink. These high-quality printmaking inks are designed for use on ceramics and also work great for screenprinting, craft foam printing, and monoprinting. A thin application yields best results for these true-to-color inks. Apply to unfired clay or bisque. Like an underglaze, inks fire to a matte finish. They can be used without glaze but require a clear glaze to be considered food-safe. Too thick of an application of the ink may result in a glossy finish. Cone 5–6.