Peter Foolen's ochres for herman de vries:
Website about natural pigments: http://www.naturalpigments.com/
includes this article about making earth pigments:
http://www.naturalpigments.com/vb/content.php?208-Pigments-from-the-Earth-2
I got a glass muller, mixing slab and dropping bottle from Cornelissen, artist's colourmen: http://www.cornelissen.com/ they have an online booklet about making up your own watercolours, tempura and oil paints here: http://www.cornelissen.com/recipes/index.html
