Sunday, 27 September 2015

How to make Ochre

Ochre is the general name for a group of earth pigments, including: red ochre, yellow ochre, purple ochre, umber, and sienna. The main mineral in ochre is limonite ( iron(III) oxide-hydroxide ). This gives them all a slight yellow colour.Red ochre takes its reddish colour from the mineral hematite ...
By: Edbed

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