Bakelite Button - identify by run hot water over it/or rub with finger then smell it. If smell Formaldehyde or Cod Liver Oil or have a sweet chemical smell. Another way is to put a bit of Simichrome Metal Polish or 409 All Purpose Cleaner on a Q-tip and rub it on the button. If the Q-tip turns yellow, the button is made from Bakelite Identifying Antiques, Vintage Buttons, Identifying Buttons, Buttons Include, Buttons Guide, Buttons Bracelets, Bakelite Buttons, Identifying Vintage, Antiques Buttons
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I SO want to do this now. This would be so cool hanging outside as a 'windchime' kinda thing!
interesting guide on types of vintage buttons and suggestions on how to identify/clean them