Amethyst (Pint)Amethyst Velvet Underglaze is a deep grape color that is vivid at cone 05, darkens at cone 5, and becomes a deep violet that begins to fade slightly at cone 10. A clear glaze deepens the color of the underglaze significantly at any temperature. If AMACO Velvets are used for food or drink, they must be covered by a dinnerware safe clear glaze and fired properly. Safety Warning Tableware producers must test all finished ware to establish dinnerware