Thanks again to Deborah Long for answering our questions about the care of metals yesterday afternoon. You can access a recording of the hour-long Webinar under “Care for Metals” on the Topics menu of the Website.
Yesterday Deborah explained that she uses precipitated calcium carbonate (CaCO3) to polish silver. Unlike commercial polishes, it doesn’t contain perfumes or additives and won’t be overly abrasive. Precipitated calcium carbonate may be ordered from chemical supply companies but they usually require ordering a large amount. The conservation supply company, Talas (http://talasonline.com/) sells 1/2, 1, and 5 pound bags (see http://tiny.cc/gc5vl). It is offered in two grades but “standard” is fine to order (“USP” is pharmaceutical grade). I wasn’t able to find calcium carbonate for sale from other conservation suppliers and it isn’t listed under silver polish or cleaners, so thank you Deborah for this tip! If you haven’t watched it yet, here is Deborah’s video explaining the entire cleaning and polishing procedure: http://tiny.cc/75fcw.
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