Ceramic - Pottery Dictionary

by Susan Mussi

GLAZE - Lead.

ca: ESMALT - Plom.

es: ESMALTE - Plomo.

Lead glaze in traditional pottery was used to glaze large pieces, in both usable and decorative ceramics, applied in the form of galena or litharge. Today its use is forbidden and lead compounds are sold as commercial frits which are subjected to health checks.

Lead oxide is the strongest flux in pottery, it gives an attractive shine to colors and when in reduction a metallic shine. In combination with silica and kaolin due to its toxicity when crude, its use is limited. It is not advisable to apply it as powder and it must be fired in very oxide atmospheres and never for usable objects.