Material Choice: Copper Gauge

材料选择：铜板厚度

type:tutorial · level:beginner · material:copper · material:brass · scale:decorative-object · scale:jewellery · stage:patternmaking

标签：材料, 铜板, 厚度, 选材

旋压适合 0.3–3 mm 铜板（过厚需动力旋压，过薄易起皱）。装饰灯罩/器皿多用 0.5–1.0 mm 紫铜（易成形、可着色）；要求刚性的件用 1.0–2.0 mm 黄铜。下料直径 ≈ 成品展开直径 ×（1+3–5% 损耗）。板材需平整无硬伤，否则旋压起棱。

Spinning suits 0.3–3 mm copper (thicker needs power, thinner wrinkles). Lampshades/vessels use 0.5–1.0 mm copper (formable, patinates); rigid parts use 1.0–2.0 mm brass. Blank diameter ≈ developed diameter ×(1+3–5% loss). Sheet must be flat and flawless or it ridges. ---