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🌈Oxides & Colorants
"An oxide which promotes ceramic fusion by interaction with other oxides. The oxides which are usually referred to as fluxes are the alkaline oxides because they interact with the glass-forming silica. Fluxes are monoxides with chemical formulae in the R 2O and RO group. The acceptable exceptions are the sesquioxides: boron oxide and bismuth oxide. Fluxes are introduced as monoxides, dioxides, carbonates, and other compounds. Silicates using R 2O and R 2O 3 fluxes soften slowly. Silicates involving RO fluxes tend to soften more quickly."
- The Potter's Dictionary of Materials and Techniques
Products In This Category
 A natural hydrated earthy ferric oxide. Contains hydrated iron oxide. Can be calcined at 550-600°C.
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Used in glass to give a green color and used in ceramic glazes to produce chrome-tin pink, low-fire reds, greens and purplish-red colors.
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Used in glass to give a green color and used in ceramic glazes to produce chrome-tin pink, low-fire reds, greens and purplish-red colors.
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Also known as Pearl Ash. It is a strong flux and can be used as a color modifier in glazes.
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An iron-bearing clay which is used as a colorant in engobes, stains, underglazes and overglaze decoration.
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The most effective opacifier to produce even, opaque, glossy glazes. The normal use of Tin Oxide in a glaze is between 5% and 10%. A dull matt glaze can result when used in excess.
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The most effective opacifier to produce even, opaque, glossy glazes. The normal use of Tin Oxide in a glaze is between 5% and 10%. A dull matt glaze can result when used in excess.
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Important opacifier. Often used in glaze to affect acid resistance, color and texture.
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A very effective zirconium glaze opacifier. Ultrox opacifiers claim uniformity of glaze opacity, texture and color over a wide range of temperatures and compositions.
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A hydrated ferric oxide with manganese dioxide. It is used for brush decoration to produce a reddish-brown. Also can be added to clay bodies to achieve a darker color.
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A useful, high temperature flux. It increases the maturing range of glazes and produces bright, glossy colors. Also may be used to give opacity to glazes.
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