Stoneware Clear Glazes will preserve and enhance the surface of your work. We suggest using Zinc Free Clear over the following colors: UG-21 Leaf Green, UG-22 Spring Green, UG-198 Dark Grey, UG-210 Forest Green, UG-232 Olive, SG-405 Designer Liner Green, and EG006 Sparkle Black Engobe. Zinc Free Clear works well with common colors that contain chrome. Chips shown are fired flat on a white clay body fired to cone 6 oxidation and cone 10 reduction. The choice of clay body, the thickness of glaze application, the firing process, and temperature will affect the fired results.