Dear puzzler I hope that you see these links, as well as images of some stamps. I have a lot of character Hermes top 40, but the color of this character is different. http://home.comcast.net/~hermeshead...l_colors.htm
The first mentioned stamp is perhaps sun-faded a bit I am guessing. I am not familiar with Hermes heads enough myself though.
Reading a bit of the links I see that the papers changed throughout their production and also the shades.
It is so easy for older Canada red-like colours to fade due to the ink's pigments. Perhaps Greece had a similar problem with the lead in the inks then and the sulphers in the air reacting to them and ctaking off some of the ink. Which was then washed off by hydrogen peroxide? Just a thought. Unknow to me.
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