Tucker's Pottery Supplies Inc.
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Tin Oxide is the most effective opacifier to produce even, opaque, glossy glazes. Traditionally used as a white glaze stain, glazes opacified with tin may flash pink in kiln atmospheres where chromium is present.
Strontium Carbonate, a source of strontium oxide in stoneware and porcelain glazes, is useful as a flux to enhance interaction and increase fusion.
Black Iron Oxide can create varied effects depending on the conditions. One of the most common colourants in pottery.
Ultrox opacifiers assure uniformity of glaze opacity, texture and color over a wide range of temperatures and compositions.
Cobalt Oxide is a reliable, stable, black powdered oxide. In small amounts it produces consistently intense blue tones. Used as a glaze colorant and brushing oxide decoration.
Zinc Oxide (Calcined) is a useful, high temperature flux. It increases the maturing range of glazes and produces glossy colors (brightens copper and cobalt colours but may dull others). Higher amounts are used in zinc matte and zinc crystalline glazes.
Copper Carbonate is a green powder used as a glaze or slip colourant. Depending on conditions and formulation it may produce green, blue-green or copper red (reds occurring most commonly in reduction firings).
Cobalt Carbonate is a fine particled lavender powder used as a colorant in glazes and slips. Very stable and reliable. Produces various shades of blue when used alone and will produce the same shades of blue when used in almost every type of glaze.
Titanium Dioxide is a glaze opacifier that is also a well-known white pigment. Titanate crystallization on cooling can lead to unique variegated surfaces.
Spanish Red Iron Oxide is an economical alternative and produces similar effects to the higher grade Red Iron Oxide.
Whiting is the most common source of calcium in glazes. It is a high temperature flux which gives durability and hardness to glazes. Whiting is the commonly-used name for Calcium Carbonate.
Burnt Umber is the calcined (heated) version of raw umber, which is a natural brown to reddish-brown earth pigment. In ceramics, Burnt Umber is most commonly used as a body stain in light/white-colored clays.
Yellow Ochre is a very high-iron clay-like material available in many parts of the world. A powerful colourant for clay bodies, engobes, underglazes, and overglaze decoration (tan, brown, grey, black and brick red hues).
Red Iron Oxide is one of the most common colourants in ceramics and has the highest amount of iron.
Lithium Carbonate is used in ceramics as a source for Lithium in making glazes. A major flux for higher temperature (Cone 5-10) alkaline glazes, it tends to produce fluid glazes with glossy surfaces.
Copper Oxide Black is a greyish-black powder used to colour slips and glazes. It acts as a flux and produces fluid glazes. May also be used as a wash via brush application to bisqueware.
Chromium Oxide (aka Chrome Oxide) is a versatile colourant used in glazes to most commonly produce various green tints.
Nickel Oxide is a glaze additive/colorant that is more concentrated than nickel carbonate. This material is used in small percentages to produce mute colors in glazes.
Barium Carbonate is the main source of barium oxide in glazes where it functions as a flux and assists in producing matte finishes. It is also used to neutralize sulfates in clay bodies. NOTE: Toxic as a powder.
A supplemental source of magnesium oxide for glazes. Magnesium Carbonate imparts strength and color, with very little shrinkage. In larger quantities, magnesium carbonate produces a dry, opaque surface in glazes.
A common glaze colorant, Nickel Carbonate produces a variety of browns, blues, grays and yellows depending on the presence of other materials in the glaze.
Manganese Dioxide is a black powder used as a glaze colourant typically giving browns, blacks and, at high concentrations, metallics. A strong flux when added in large amounts to clay bodies.
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