I have been messing around with crazing as a deliberate decorative effect lately. But the crackle surfaces I have been creating pale in comparison to the Snowflake Crackle glazes John Britt writes about in the November 2011 issue of Ceramics Monthly. As you can see here, these crackled surfaces are pretty spectacular. Today, I am giving you all a sneak peek at that article, which includes lots of snowflake crackle glaze recipes!
Though many are unaware of it, poor glaze fit can reduce the strength of a fired ceramic piece to as little as one-fifth the strength of a similar piece with ideal glaze fit. While good glaze fit seldom occurs by accident, it can be planned for and controlled. Some ceramic artists use glaze fit to induce crazing as a decorative technique (crackling) while others artists may want to avoid a “crackle” glaze.