Case: Fold-formed Copper Leaf Brooch
案例：铜叶片胸针的折叠生成
标签：叶片造型, 叶脉肌理, 折叠组合, 焊接固定, 做旧上色
用 0.6 mm 紫铜片对折后沿叶形弧线二次折叠，锤压折脊使成叶身隆起；展开后在主脉处再折一次并用錾子轻压出侧脉。修剪叶尖与叶柄，背面焊别针。最后用硫化钾溶液做深浅渐变做旧，凸显叶脉立体感。此件证明折叠成型能以零模具复制自然叶片。
A 0.6 mm copper sheet was folded, then second-folded along a leaf arc; the crease was hammered to raise the leaf body. After opening, a main vein fold plus light chasing with a punche created side veins. The tip and stem were trimmed and a pin soldered on the back. Finally a potassium-sulfide gradient patina highlighted the veins—proving fold forming replicates leaves with no模具. ---