Key term for OCR GCSE Classical Civilisation, used in Decorative Arts.
A three-stage kiln process (Oxidising-Reducing-Oxidising) used to control the oxygen supply and dictate the final colour of pottery glaze.
O-R-O firing appears in OCR GCSE Classical Civilisation revision content for The Homeric World, especially Decorative Arts and Decorative objects and their creation.
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