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Battara · 9th April 2010, 08:52 PM

Another piece to the puzzle - sulphur. Exposure to sulphur is what darkens ivory. The more sulphur in the particular environment (or longer exposure) the darker and yellower it becomes.

9th April 2010, 08:52 PM	#9
Battara EAAF Staff Join Date: Dec 2004 Location: Louisville, KY Posts: 7,267	Another piece to the puzzle - sulphur. Exposure to sulphur is what darkens ivory. The more sulphur in the particular environment (or longer exposure) the darker and yellower it becomes.