Plainsman Clays | IROXR
Iron Oxide Red
Red iron oxide is ferric oxide, ground fine enough to give an even colour with no specks. The colour it gives depends on the amount and on the kiln atmosphere.
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Red iron oxide gives amber and tan in oxidation from a small addition, and the celadon greens and blues in reduction. More of it takes the colour through olive to the browns and blacks of a tenmoku. A saturated addition gives the iron reds, which need oxidation and turn maroon or black if the kiln reduces hard. Iron is also a powerful flux in reduction, its effects are lessened within oxidation environments. As ferric oxide it stiffens a melt, and reduction converts it to the ferrous form, which thins one. That is why the same glaze can run down the pot in reduction and stay in place in oxidation. Specks come from granular iron, not from this, which is milled too fine to speck.
- Ferric oxide, milled fine for an even colour with no specks
- Amber in oxidation, celadon greens and blues in reduction
- More of it gives tenmoku browns and blacks, a saturated addition gives iron reds
- Stiffens a melt in oxidation, thins one in reduction
