If you fire an electric kiln and keep reading about "reduction" glazes you can't seem to reproduce, this is why. Atmosphere, whether the firing is oxidizing or reducing, changes glaze chemistry, and electric kilns are naturally oxidation environments. Here's what that means and how to work with it.
Oxidation means there's plenty of oxygen in the kiln during firing, which is the default for an electric kiln. Reduction means oxygen is deliberately starved, usually in a gas kiln, so the flame pulls oxygen out of the glaze and clay materials themselves. That oxygen-hungry atmosphere is what produces classic reduction looks like celadon greens, copper reds, and rich iron effects.
| Atmosphere | Typical kiln | Signature results |
|---|---|---|
| Oxidation | Electric | Bright, clean, predictable color |
| Reduction | Gas | Celadon, copper red, iron depth |
Sort of, and with real caveats. Some potters introduce combustibles for localized "reduction" effects, but true, controlled reduction is hard on electric elements, which oxidize and degrade quickly without a protective coating. For most electric-kiln owners, the smarter move is to lean into oxidation and use glazes formulated for it.
You don't need a gas kiln to make beautiful work. Modern oxidation glazes have closed much of the gap, and a controlled cooling schedule unlocks matte, satin, and crystalline surfaces that rival reduction depth. Fighting your kiln's natural atmosphere is a losing game; designing for it is where great electric-fired work comes from.
If reduction glazes are non-negotiable for your work, that changes the kiln conversation. Call or text me, Spencer, at (801) 839-5882 and we'll figure out the right setup.
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