fit is an important issue for potters making functional ware as
it is considered unhygienic to have a crazed glaze
on the inside of a domestic pot. Low temperature clay / glaze systems
such as maiolica are particularly effected by crazing as cracks
in the white gaze may not only be unpleasant aesthetically but will
also allow moisture to permeate the unvitrified body which causes
even more crazing to occur sometimes years after the form was fired.
fired liquid containers, in which the clay body has not been sufficiently
vitrified, will eventually leak if the glaze inside the form has
stoneware temperatures crazing is sometimes seen as aesthetically
pleasing. In such cases the crazing may be visually enhanced with
a stain (e.g. crackle glazes, Chinese celedons). If fired to its correct
maturing temperature the vitrified stoneware liquid container will
not allow the permeation of moisture and therefore will not leak even
though the glaze inside or out may be crazed.