Red ochre

Red ochre and yellow ochre (pronounced OAK-ur, from the Greek ochros, yellow) are pigments made from naturally tinted clay. It has been used worldwide since prehistoric times. Chemically, it is anhydrous iron (III) oxide.

Further reading

• Red Ochre and Yellow ochre, from Pigments through the ages.
• A recipe for red ochre paint.
• Fuller, Carl; Natural Colored Iron Oxide Pigments, pp. 281-6. In: Pigment Handbook, 2nd Edition. Lewis, P. (ed.). New York: John Wiley & Sons, 1988.
• Thomas, Anne Wall. Colors From the Earth, New York: Van Nostrand Reinhold, 1980.