I posted this in the wrong thread, it is in response to JJBlair's search for a means to replicate accurate greening:
I wonder if the mild amount of tannic acid in the maple combines with the external acids from sweat, etc. to darken the color. Check out this chemistry experiment.
http://www.sewanee.edu/chem/Chem&Art/Detail_Pages/Projects_2007/Vaughn/index.htm
http://www.sewanee.edu/chem/Chem&Art...ughn/index.htm
I wonder if the mild amount of tannic acid in the maple combines with the external acids from sweat, etc. to darken the color. Check out this chemistry experiment.
http://www.sewanee.edu/chem/Chem&Art/Detail_Pages/Projects_2007/Vaughn/index.htm
http://www.sewanee.edu/chem/Chem&Art...ughn/index.htm