Has anyone been successful in reversing the case yellowing of
HP-97 Calculators?
I suspect the yellowing is due to a chemical change in the plastic so a possible thought would be to put it in a bag with some (yet to be identified) odoriferous agent that would penetrate and reverse the action.
Has anyone explored this or some other approach? All thoughts and ideas will be appreciated -- Mike
HP-97 Case Yellowing
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