John, During the meeting in Albuquerque I attended a class on ivory repair given by William Smith. To bleach ivory he uses Miss Clairol Hair Bleach (seems to be a combination of hydrogen peroxide and phosphoric ); Clairoxide. He cleans the key or sands it using 400 g to break the grease glaze and applies a little and puts it in the sun. I do not know how much is a little. For blanks, he will put them in a jar of it 24 hrs, tharinse with CLEAR dish detergent, and dry on paper towel, turning frequently to prevent curling. He said NEVER to use clorox. Mary Logue
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