What is shivering, what causes it and what can I do to limit it in the future?
When you fire bisque in the glaze firing, the bisque will basically expand during the firing and contract during the cooling phase. Shivering is typically defined as occurring when the bisque and glaze shrink at different rates. If the bisque shrinks more than the glaze, the glaze has nowhere to go but “shiver” off or “flake” off the bisque. “Shivering” is normally defined as the opposite problem to “crazing” since crazing is often a result of the glaze shrinking more than the bisque. The result is a network of fine cracks in the glaze.
