INLAID BRONZE BIANHU, LATE EASTERN ZHOU DYNASTY When this piece first came to us it was impossible to tell that it had such elaborate, decorative inlays and was so fine-looking example of its ilk. It was composed of a copper alloy, and had filthy deposits of chlorides all over it. The inlaid designs that we…
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…
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