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Daily Archives: December 2, 2014

Diana ring

ANNIVERASRY RING Repair

Blog, Jewelry repaIr, Metal RestorationBy Nathan KrishtulDecember 2, 2014

  ANNIVERASRY RING This sapphire anniversary ring boasts an amazingly handsome stone—an unusual color, an unusual shape, an unusual depth, and in general, a simply lovely jewel.  Unfortunately, the owner, in her eagerness to sport this new anniversary gift, made the unwise choice of wearing it adjacent to her diamond eternity band.  Because the sapphire…

Glass conservation and restoration.

Glass conservation and restorationBy Nathan KrishtulDecember 2, 2014

Glass is usually the most stable of archaeological materials, but glass artifacts, and 17th-century glass in particular, can undergo complex disintegration. Ideally, glass should consist of 70-74 percent silica, 16-22 percent alkali or soda ash (sodium carbonate) or potash (potassium carbonate, usually derived from wood ash), and 5-10 percent flux (lime [calcium oxide]). Soda-lime glass…

Art and Antiques Restoration and Conservation
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