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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 R2O 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 R2O and R2O3 fluxes soften slowly. Silicates involving RO fluxes tend to soften more quickly."
-The Potter's Dictionary of Materials and Techniques

Displaying products 26 - 37 of 37 results
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Nickle Oxide, Black (1/4 lb.)
Nickle Oxide, Black (1/4 lb.)
Black nickel produces browns, blues, grays and yellows in glazes. It can also tone down more intense colorants such as cobalt and copper. Maximum use is usually 3%.
Axner Price: $8.66
Nickle Oxide, Black (1/4 lb.)
Nickle Oxide, Black
Nickle Oxide, Black (sold per lb.)

Black nickel produces browns, blues, grays and yellows in glazes. It can also tone down more intense colorants such as cobalt and copper. Maximum use is usually 3%.
Axner Price: $26.00
Nickle Oxide, Black (sold per lb.)
Ochre, Yellow
Ochre, Yellow (sold per lb.)

A natural hydrated earthy ferric oxide. Contains hydrated iron oxide. Can be calcined at 550-600°C.
Axner Price: $4.49
Ochre, Yellow (sold per lb.)
Potassium Bi-Chromate
Potassium Bi-Chromate (sold per lb.)

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.
Axner Price: $16.43
Potassium Bi-Chromate (sold per lb.)
Potassium Carbonate
Potassium Carbonate (sold per lb.)

Also known as Pearl Ash. It is a strong flux and can be used as a color modifier in glazes.
Axner Price: $3.81
Potassium Carbonate (sold per lb.)
Raw Sienna
Raw Sienna (sold per lb.)

An iron-bearing clay which is used as a colorant in engobes, stains, underglazes and overglaze decoration.
Axner Price: $6.04
Raw Sienna (sold per lb.)
Vanadium Pentoxide
Vanadium Pentoxide (sold per lb.)

A common glass colorant producing various tints of yellow and greenish yellow. Sold by the pound.
Axner Price: $37.64
Vanadium Pentoxide (sold per lb.)
Tin Oxide
Tin Oxide (sold per lb.)

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.
Axner Price: $27.76
Tin Oxide (sold per lb.)
Titanium Dioxide
Titanium Dioxide (sold per lb.)

Important opacifier. Often used in glaze to affect acid resistance, color and texture.
Axner Price: $4.81
Titanium Dioxide (sold per lb.)
Umber, Burnt
Umber, Burnt (sold per lb.)

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.
Axner Price: $4.78
Umber, Burnt (sold per lb.)
Zinc Oxide
Zinc Oxide 910 (sold per lb.)

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.
Axner Price: $4.90
Zinc Oxide 910  (sold per lb.)
Zircopax Plus
Zircopax Plus (sold per lb.)

A very effective zirconium glaze opacifier. Equivalent to Ultrox Extra. Replaced regular Zircopax and Superpax which are no longer available.
Axner Price: $4.43
Zircopax Plus (sold per lb.)
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