What's The Stuff? - sources

http://www.ellen-trezevant.com/pallette_medium.htm

- This site includes information on how to mix pigments and the binding agent, egg yolks, for tempera paints.

http://www.eggtempera.com/index.html

- This site offers a lot about pigments, and really goes in depth of the different kinds used to make different shades of paint. Also gives information on the toxicity of certain pigments.

http://www.danielsmith.com/Learn/Articles/Making-Egg-Tempera.asp

- Also very helpful in learning about the characteristics of various pigments, and instruction on how to prepare pigments.

http://www.winsornewton.com/about-us/our-history/history-of-pigments/

- A very detailed description of the history of pigments.

http://www.visual-arts-cork.com/painting/tempera.htm

- The history and uses of tempera, also gives examples of international artists who have used tempera paint.