An enamelled vessel can contain several different metal elements. The Shippo Art Village’s technical reference separates the outline wire from the material beneath the enamel. Those terms describe construction, rather than interchangeable levels of decoration.
Technique and structure
For yusen shippo, the museum describes thin, tape-like metal wire, mainly silver, placed upright along a design on a copper or silver base. Enamel fills the spaces before firing and polishing. It separately defines gintai as a silver base and ginbari as silver foil applied over a copper base beneath transparent or translucent enamel. A silver-coloured line and a silver body therefore identify different parts of an object.
Ask which part a material claim describes
A useful catalogue description should distinguish base, wire and any foil layer. The museum also describes wireless techniques, so the absence of visible outlines is not enough to identify a different base metal. These distinctions help interpret a label without attributing a method to an unexamined object.
For international readers
Confirm the exact construction and maker’s handling guidance for an individual piece. This article identifies terminology; it does not verify food use, repairability, value or resistance to impact.
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日本語
尾張七宝：銀線と素地から構造を読む
あま市七宝焼アートヴィレッジは、有線七宝を金属素地に線を立て、間に釉薬を入れて焼成・研磨する技法と説明します。銀胎は銀の素地、銀張は銅素地の表面に銀箔を用いる区別です。銀色の外観だけから内部の素材までは判断できません。