Those
images had to be clearly recognizable from afar and it had to be easy to
distinguish one from the other. To make this possible they used emblematic
and/or figurative rather large illustrations and few distinctive strong
colours. For the ground coat on metallic surface they would use silver or
gold and for the more decorative and more detailed parts colours like silver,
gold, a strong blue, red, black and green. The art of painting and arranging
the images would be subject to heraldry.
