03-22-2009, 06:29 AM
I doubt we'll ever know what colours were used to represent. I doubt there was even a standard that all artists adhered to. It is impossible to look at an illustration and determine the material an item was made from unless there are a large number of illustrations done by the same artist, and even then, that convention would only apply to that particular artist.
Author: Bronze Age Military Equipment, Pen & Sword Books