Ceramic Glaze Terminology

Defined by the pottery health regulations as a glaze which does not release more than 5 of its dry weight of soluble lead when subjected to a specified test using hydrochloric acid.

Ceramic glaze terminology.

Transparent glaze transmits light clearly. It also gives a tougher surface. See also claybody glaze fit high temp glaze intermediate glaze low temp glaze. 14 99 unicorn spit 5770013 gel stain glaze weathered daydream 4 ounce bottle grey 172.

Wedging a method of kneading clay to make it homogenous by cutting and rolling. Without the fired surfaces the ware would not be able to hold water or be safe for food. It was developed by the chinese over 1000 years ago. Often times it is a clear glossy glaze applied over a matte glaze to make it glossy.

An iridescent optical appearance due to light reflections producing diffraction patterns on a glazed surface. Throwing creating ceramic shapes on the potter s wheel. Stoneware all ceramic wear fired between 2 100 and 2 300 degrees. Glazes are the protective coatings that make ceramics safe and useful.

Glaze is also used on stoneware and porcelain. Underglaze decoration applied to biscuit pottery and covered with a glaze. Glaze can serve to color decorate or waterproof an item. Duncan inkit 1 envision glaze kit for ceramics set of 12 best selling colors in 4 ounce jars with free how to paint ceramics booklet 79.

Overglaze a glaze applied on top of another glaze. Learn the meanings to hundreds of common pottery glaze and craft terms. When purchasing ceramic pieces it is important to consider the type of glaze in terms of food safety durability and fit with the underlying claybody. Glazing renders earthenware vessels suitable for holding liquids sealing the inherent porosity of unglazed biscuit earthenware.

Plasticity a workable property of clay that enables it to take and hold any impression. Long tapered knife useful for trimming cast or pressed pieces and for separating mold components. Vitrification the firing of pottery to the point of glossification. Widely used and misused term referring to any earthenware pottery glazed with an opaque glaze usually white and overglaze decoration.

Throwing the term used when referring to forming or shaping on a potter s wheel. Pertaining to the hard finish of a fired glaze or the nonabsorbency of a fired body. Or low sol glaze.