I'm preparing a piano for our chapter's "Gross Anatomy" session, and would like to find a dye or universal colorant of some kind for CA glue and for nitrocellulose lacquer. I want to make it easy to see how far CA penetrates the pinblock, and how far lacquer penetrates hammers. The lacquer will probably take the universal colorants I already use for shellac tinting, but I'm thinking that would probably turn the CA to stone. I didn't try it yet. Any chemists in the house? Thanks, Greg Graham
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