Portland vase

Japanese: ポートランド・バーズ(英語表記)Portland vase
Portland vase
A Roman glass vase in the British Museum. Its provenance is unknown, but in the 17th century it was in the Palazzo Barberini in Rome, and at the end of the 18th century it was purchased by the Portland family and transferred to the British Museum in 1810. The importance of this glass vase lies in its technique and iconography. The technique used is to make the body out of blue glass containing copper oxide, then immerse the body in liquid white glass made from antimony, layering a white layer about 0.5 mm thick on the surface, and after it has cooled, scraping off the white glass layer, leaving only the image.

Source: Heibonsha World Encyclopedia, 2nd Edition Information

Japanese:
大英博物館蔵のローマ・ガラスの壺。出土地は不明であるが,17世紀にはローマのバルベリーニ宮殿にあり,18世紀末ポートランド家が購入,1810年大英博物館に移管した。このガラス壺の重要性はその技法と図像にある。技法は,酸化銅を含有する青ガラスによって本体を作り,アンチモンによる液体状の白ガラスに本体を浸してその表面に厚さ約0.5mmの白い層を重ね,それが冷えた後に図像のみを残して白色ガラス層を削り落とす方法である。

出典 株式会社平凡社世界大百科事典 第2版について 情報

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