Non-toxic. Astro Gems are non-moving textural glazes that contain two sizes of tiny crystals. When fired these crystals provide jewel-like spots that compliment and enhance the stone type or dead matte surface of the glaze. These unique glazes can be applied to greenware or bisque. For the best results the glazes are applied to greenware. Applying these glazes to bisque require more drying time between coats. Fire to cone 06.
Astro Gems porous surface makes them unsuitable for items intended for food and drink. However, they can be used on the outside of storage containers. Because porous surfaces are difficult to clean when soiled, the surface should be treated with AC-301 Repellent Sealer when the project is completed.