Choose from 24 vibrant glazes offered in a range of transparent celadon-like colors, bright solids to mottled/ varigated. All Speedball glazes and underglazes are NON-TOXIC and LEAD-FREE and display the AP Seal. Apply 2-3 heavy coats of glaze for proper coverage. Wash with water. Fire Stoneware glazes to cone 5-6. They also all come with sealed aluminum foil lids to keep the products from drying out.