Iron Oxide - Synthetic Red
Iron Oxide - Synthetic Red Fe2O3 Ferric Oxide (BA490)
This is very fine and produces more even shades from honey to dark red browns (2-10%).
The final colour obtained with iron oxide varies with the type of glaze, firing temperature and kiln atmosphere.
Iron oxide is also an active flux in glazes and even in small amounts will make a glaze noticeably more fluid.