Re: OT: Color Standards


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<<Pigments in watercolors and pigments in ink are both pigments. And paper is
paper no mater what kind. All will age and change. A 40 year old color chart 
is a nice collectors Item. >>

But as you know not all pigments are identical chemically, or physically. 
Traditional artist's pigments range from earth to ground rock to botanical 
colors precipitatated onto inert chalk. Some pigments are more stable than 
others. The organic lakes, for example tend to be very fugitive, the earth 
and mineral colors tend to be less so but may darken appreciably with time, 
and so on and so forth. 

The Ridgway dates to 1912. 

Changes or no changes, as far as I can tell the only way to have any clue 
about what Robert Sturtevant meant by "cotinga purple" when describing an 
iris in the 'twenties is to look it up in a Ridgway. 

Anner, in Virginia
ChatOWhitehall@aol.com





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