Georgies' cone 6 crackle glazes give their best and intended results when used on porcelain or tight white stoneware clay bodies. Crackle glazes are not food safe because of the nature of their fired surfaces. Samples on the right show color results with India ink applied after firing. Crackle glazes are not food-safe.
India ink will highlight the crackle patterns in the fired glaze. India ink, however, SHOULD ONLY BE USED WHEN THE CLAY BENEATH THE GLAZE IS VITREOUS (fused and waterproof as a result of firing). If the clay is not vitreous, the India ink will soak into the clay body and spread, with less-than-desirable results. If the ink soaks in, there is no cure other than refiring the piece to burn out the ink.
About this glaze:
A deep, rich classic Oriental copper blue-turquoise that creates gem-like pools of depth. Add ink to add even more richness to the color.
NOTE: This copper blue-turquoise is the fired color ONLY ON PORCELAIN CLAYS. All stoneware clays contain trace amounts of iron, and Peking Blue turns GREEN when iron is present in the clay body.
Downloadable glaze info:
- Glaze Color Chart
- Crackle Glazes Color Chart
- Color Play/Combos Pg 1
- Color Play/Combos Pg 2
- Color Play/Combos Pg 3
- Color Play/Combos Pg 4
- Interactive Pigments for 2015