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<p>[QUOTE=&quot;Joan, post: 504583, member: 5398&quot;]Maybe celluloid?&nbsp; Here are two vintage buttons that have a pearlized look and I&#039;ve always called them celluloid, but I&#039;m not an expert. Celluloid does tend to deteriorate if stored where air can&#039;t circulate, and maybe that&#039;s what is happening to the back of your brooch. If your brooch is celluloid, it shouldn&#039;t be stored in a plastic bag or tightly sealed container, or near other celluloid items that are starting to deteriorate because they emit gases that can cause the other items to deteriorate. [ATTACH=full]164968[/ATTACH] [ATTACH=full]164969[/ATTACH][/QUOTE]</p><p><br /></p>

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