Crackle glazes are for decoration only and are not recommended for use on food or any container that will be exposed to water.
It is advisable not to apply a crackle glaze on a piece that has another type of glaze on it too. When fired, there will be two different expansion rates and this may cause pieces to break or crack
Do not use crackle glaze on the outside of a piece if another type of glaze is being used inside.
Black paste shoe polish or ink can be used to accent the cracks in crackle glazes.
Contrary to most other glazes, crackle glazes only require two coats in application.