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Ochre

Chemistry

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Miscellaneous

Family: Colorant
Region: None
Mined At: Unspecified
Raw Mineral: Yes
Generic: No

Notes

Used in engobes, underglazes, and overglaze decoration for tan, brown and brick red hues.

Note

(Richard Willis)

A ferric oxide earth with significant percentages of manganese and other metals that makes it quite suitable as an engobe to interact with an overglaze for “under-glaze” color; or to smoke-scorch before glazing in order to blacken the clay body. Traditional to celadons and aka, or “black body, red-glaze”, raku see iron earths, and the titled entry for yellow ochre
— yellow ochre: hydrated ferric oxide (Fe₂O₃ + H₂0)
— black, or “shadow”, ochre: hydrated FeO plus Mn
— red ochre: (“ruddle”) anhydrated ferric oxide (Fe₂O₃)

Suppliers

Generic

Authors

Tony Hansen (Owner)

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