Generally contains 25% kaolin, 45% quartz, and 30% feldspar, firing at lower temperatures.
Acts as a "flux," melting during firing to create a glassy matrix that bonds the other ingredients together, making the final piece non-porous (vitrified). Porcelain
Acts as a framework for the fired material, increasing mechanical strength and resistance to thermal shock. Generally contains 25% kaolin, 45% quartz, and 30%
Often reinforced with alumina or ball clay for extreme durability in commercial use. Generally contains 25% kaolin
Proportions vary based on the intended use and firing temperature:
Specifically added to Bone China recipes (up to 50%) to allow for thinner, lighter, and more translucent pieces. Common Formulations