Common Glaze Problems

Shivering - A glaze with a lower expansion compared to the clay
Crazing - A glaze with a higher expansion compared to the clay
Crawling - Drying of underglaze before the application of the overglaze or excessive glaze
Blisters - Excessive glaze applied
Pin-Holing - Using glaze that isn’t mixed well or a badly controlled firing process

image courtesy flyeschool.com