Product Overview Commonly known as Haematite or ferric oxide, Red Iron Oxide is one of the most versatile and essential colorants in pottery. In its raw powder form, it presents as a rich rust-red. Once fired, it transforms into a striking spectrum of earthy tones depending on your glaze base, application, and kiln atmosphere.
Firing Profiles & Color Responses The final hue is highly responsive to your firing environment, underlying clay body, and oxide combinations: Painted onto Clay or Biscuit: Yields deep, traditional brown-black tones. Painted onto Unfired Glaze or Mixed Directly In: Develops warm honey-browns, deep blacks, or rich greens. Reduction Firing: Shifts into a diverse palette of honey-brown, black, green, or classic pale blue (celadon).
This synthetic version (Grade 4511) is exceptionally finely grained. However, because iron oxide particles naturally want to clump, speck-free pigmentation can never be fully guaranteed right out of the bag.