Glossary of Earthenware Midfire Glazes as used by Peter.

Note the names are just descriptive labels, not necessarily definitive.

The images are shown to see examples of the glazes.
The teapots shown are not being offered for sale unless shown on the main buying page.
The glaze appearance alters over white clay or red clay.
Each teapot is unique, handmade, handcrafted, original, and new.

Earthenware generally means fired clay with a high porosity typically in the temperature range 1000°C to 1200°C. The porosity provides an insulation to keep the brew warm.

The kiln firing range called midfire is approx 1120°C to 1220°C, lower than for stoneware and at the higher end of earthenware.

For midfire I use a blend of terracotta/earthenware clay and low stoneware clay. Clay porosity is lowered giving better durability compared to ordinary earthenware, while some porosity is retained to act for good heat insulation.

Typically Earthenware and Midfire is not a reduction glaze such as with a high fired Stoneware or Porcelain Glaze, but an oxidation glaze, and can be fired in an electric kiln.

The advantage with midfire is a saving in fuel, effort, and time, reducing the environmental impact.

Celadon Green

Celadon usually refers to a high fired porcelain of a subtle jade green tint from the reduction of Iron Oxide.

This midfire version, here I am referring to a reminiscent glossy, translucency and depth of color. With a light green coloring using Tin and Copper oxide, and a pinch of Red Iron oxide.


An opaque white tin glaze, or Bristol glaze, semi gloss. Also as is called Maiolica, Delftware, Lusterware, Faience.

The base tin glaze, opaque, decorated in the Majolica style or not, plain white or colored with Cobalt Carbonate for blues or Copper Oxide for greens.

Opal Green

An opalescent quality in the depth, translucency, and complexity of the glaze.

The color green is from Tin and Copper Oxide. Semi-Transparent and Glossy.

Rockingham Brown

This is a traditional dark brown glaze using Red Iron Oxide and Manganese Dioxide.

The pottery form is usually a round body. White slip can be used for decoration. Semi-Transparent and Glossy.


This refers to the amber and brown color in a liquid and translucent glaze.

The colorants are Red Iron Oxide or Yellow Ochre. Semi-Transparent and Glossy.

The images are shown to see examples of the glazes.

Recently I have developed a range of varietal earthy, matt, glazes.

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