Ceramic Glaze Terminology

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Ceramic glaze terminology.

Glaze is also used on stoneware and porcelain. Ceramic glaze is an impervious layer or coating of a vitreous substance which has been fused to a ceramic body through firing. Transparent glaze transmits light clearly. 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.

Porcelain a pottery ware that when fired is pure white. Glazes are the protective coatings that make ceramics safe and useful. Learn the meanings to hundreds of common pottery glaze and craft terms. Throwing creating ceramic shapes on the potter s wheel.

Often times it is a clear glossy glaze applied over a matte glaze to make it glossy. Glazing renders earthenware vessels suitable for holding liquids sealing the inherent porosity of unglazed biscuit earthenware. It also gives a tougher surface. Stoneware all ceramic wear fired between 2 100 and 2 300 degrees.

Pertaining to the hard finish of a fired glaze or the nonabsorbency of a fired body. See also claybody glaze fit high temp glaze intermediate glaze low temp glaze. 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. Glaze can serve to color decorate or waterproof an item.

Widely used and misused term referring to any earthenware pottery glazed with an opaque glaze usually white and overglaze decoration. Wedging a method of kneading clay to make it homogenous by cutting and rolling. An iridescent optical appearance due to light reflections producing diffraction patterns on a glazed surface. Without the fired surfaces the ware would not be able to hold water or be safe for food.

Long tapered knife useful for trimming cast or pressed pieces and for separating mold components. 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. Vitrification the firing of pottery to the point of glossification. It was developed by the chinese over 1000 years ago.

Plasticity a workable property of clay that enables it to take and hold any impression. Underglaze decoration applied to biscuit pottery and covered with a glaze. Overglaze a glaze applied on top of another glaze.