CONTRACTION
ca: CONTRACCIÓ
es: CONTRACCIÓN
Contraction is the shortening and thickening of a material; clay contracts, shrinks, during drying and firing. Glazes contracting can be accidental or intentional, as when being fired the glaze shrinks more than the ware that it has been applied to. If accidental, it is impossible to repair; this is explained under cracking, and if intentional, under crackle.
