 Grog is a hard-fired clay crushed to various mesh sizes. It may be added to clays for tactile and visual texture. It can aid in opening the body for drying purposes, reducing shrinkage, and to add 'Tooth' during the forming process.
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A powdered, natural gum material used as a binder and suspending agent in glazes.
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A powdered, natural gum material used as a binder and suspending agent in glazes.
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A naturally mined iron titanium oxide mineral. It is generally black as sand, odorless, tasteless, opaque under a microscope, non-flammable and insoluble at 20°C.
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Produces grey brown colors in engobes and in underglazes that include zinc. If tin is present it may produce pink and reddish browns. Can also be added with manganese compounds to clay bodies to produce greys or to darken a color.
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Ferric oxide. Produces various shades of brown or green when used as a glaze colorant or decorative oxide. In high fire matt glazes, iron oxide and titanium can produce reddish colors.
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A natural iron oxide. Reddish-brown raw color.
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Ferric oxide. Basically the same as black iron oxide except not as concentrated.
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81% Fe2O3 , this imported, natural iron oxide is bright red in its raw form.
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A weaker form of iron—high clay content.
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6 Tile is an airfloated kaolin with bright firing properties yet highly plastic. It thus offers high green strength for superior jiggering and wet processing properties.
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A secondary water washed kaolin mined in Florida. It is fairly plastic and very white firing compared with most other American kaolins. It has excellent casting properties.
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A medium particle size kaolin clay heat treated at a high temperature (calcined) with high whiteness and good opacifying properties.
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A blended English china clay, combining moderate plasticity, low titania content and relatively high flux content, low shrinkage and white fired color. It is excellent for making translucent throwing or casting porcelains.
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A white sedimentary clay replacement for Avery in pottery.
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A plastic kaolin from South Carolina which is considered a course particle sized kaolin and used primarily for white stoneware bodies. Has very good throwing properties but does not lend itself to translucency.
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A white firing highly plastic English kaolin with good translucency characteristics.
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A refractory material used to reduce shrinkage in clay bodies. Because of its interlocking crystal structure it also gives strength to clay bodies.
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A refractory material used to reduce shrinkage in clay bodies. Because of its interlocking crystal structure it also gives strength to clay bodies.
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A refractory material used to reduce shrinkage in clay bodies. Because of its interlocking crystal structure it also gives strength to clay bodies.
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A refractory material used to reduce shrinkage in clay bodies. Because of its interlocking crystal structure it also gives strength to clay bodies.
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It is a source of Lithia for glazes. A strong flux, to aid in the melting of glazes at 1472°F. Used extensively as a secondary flux in leadless ^06 and ^5 glazes. Improves the brightness of glazes, and increases the firing range.
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It is a source of Lithia for glazes. A strong flux, to aid in the melting of glazes at 1472°F. Used extensively as a secondary flux in leadless ^06 and ^5 glazes. Improves the brightness of glazes, and increases the firing range.
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It is a source of Lithia for glazes. A strong flux, to aid in the melting of glazes at 1472°F. Used extensively as a secondary flux in leadless ^06 and ^5 glazes. Improves the brightness of glazes, and increases the firing range.
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It is a source of Lithia for glazes. A strong flux, to aid in the melting of glazes at 1472°F. Used extensively as a secondary flux in leadless ^06 and ^5 glazes. Improves the brightness of glazes, and increases the firing range.
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Source of magnesium in glazes. Imparts strength and color with little shrinkage. In larger proportions, it produces a dry opaque quality to glazes.
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For refractory applications.
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Also known as Epsom salts. It can thicken a glaze to improve adhesion to non-porous surfaces. Also acts as a suspension agent.
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A mineral form of black iron oxide. When mixed in clay body or glazes, produces a speckling effect. (Should be screened due to inconsistent particle sizes.)
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A weak coloring agent. In an alkaline glaze, a blue-purple or plum color can be obtained. In leadless glazes, a purple-brown may result. It is a power flux.
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