Glaze firing

photophoreCeramic glazes generally contain silica to form glass, in combination with a mixture of metal oxides.

Glazes are applied on a bisque piece with a brush or sprayed. Or the piece is dip-glazed.

When applied to earthenware, glazes are fired at between 1,000 and 1,050 degrees. Then they melt to form a smooth glassy surface which is waterproof.

vaseblancrosesThe lead-free glazes I use for tableware are safe. The non-glazed earthenware pieces I make are not waterproof but can be treated with a hydrophobic solution (not tableware safe).