European Tableware Drawing Tradition
欧洲餐具拉深传统：从汤盆到现代器皿
标签：餐具, 传统, 拉深, 流派, 镀锡
欧洲铜器皿拉深传统可追溯至 18 世纪 Sheffield 与法国 Villedieu-les-Poêles 一带的作坊：单动冲床配生铁凹模，一道拉成浅盆（拉深比 ≤1.6），内壁热镀锡（232 °C 熔锡 + 棕榈油助镀）防铜锈。这套"拉深-镀锡"两步法延续至今，仍是当代铜制餐盆、浴缸的标准路线。传统验收标准是注水 24 h 无渗、锡层经 10% 硫酸铜点滴不析铜。
European vessel drawing goes back to 18th-century Sheffield and Villedieu-les-Poêles workshops: single-action presses with cast-iron dies drew shallow basins in one pass (draw ratio ≤1.6), then hot-tinned inside (molten tin at 232 °C with palm-oil flux) against verdigris. This draw-then-tin route survives unchanged in today's copper basins and baths. Acceptance was 24 h water-tight and no copper swap under a 10% copper sulfate spot test. ---