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Metallic oxides with 50% Ferro frit 3134 in crucibles at cone 6ox. Chrome and rutile have not melted, copper and cobalt are extremely active melters. Cobalt and copper have crystallized during cooling, manganese has formed an iridescent glass.
Glossary |
Metallic Glazes
Non-functional ceramic glazes having very high percentages of metallic oxides/carbonates (manganese, copper, cobalt, chrome). |
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Glossary |
Melting Temperature
The melting temperature of ceramic glazes is a product of many complex factors. The manner of melting can be a slow softening or a sudden liquifying. |
Glossary |
Flux
Fluxes are the reason we can fire clay bodies and glazes in common kilns, they make glazes melt and bodies vitrify at lower temperatures. |
Glossary |
Crystallization
Ceramic glazes form crystals on cooling if the chemistry is right and the rate of cool is slow enough to permit molecular movement to the preferred orientation. |
Glossary |
Metal Oxides
Metal oxide powders are used in ceramics to produce color. But a life time is not enough to study the complexities of their use and potential in glazes, engobes, bodies and enamels. |
Glossary |
Refractory
In the ceramic industry, refractory materials are those that can withstand a high temperature without deforming or melting. Refractories are used to build and furnish kilns. |
Glossary |
Colorant
In ceramics and pottery, colorants are added to glazes as metal oxides, metal-oxide-containing raw materials or as manufactured stains. |
Oxides | Cr2O3 - Chrome Oxide |
Oxides | CoO - Cobalt Oxide |
Oxides | CuO - Cupric Oxide |
Materials |
Chrome Oxide
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Materials |
Iron Chromate
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Materials |
Copper Oxide Black
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Materials |
Cobalt Oxide
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Materials |
Cobalt Carbonate
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Materials |
Rutile
A raw TiO2-containing mineral used in ceramics to color and variegate glaze surfaces. |
Materials |
Manganese Dioxide
A source of MnO used in ceramic glazes and the production of ceramic stains. Commonly made by grinding pyrolusite rock. |
Materials |
Ceramic Rutile
Rutile mineral ground to a very fine particle size (e.g. 325 mesh) contributes titanium and iron that colors and variegates ceramic glazes. |
Materials |
Iron Oxide Red
Red iron oxide is the most common colorant used in ceramic bodies and glazes. As a powder, it is available in red, yellow, black and other colors. |
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