紫铜彩虹色梯度（火焰法）/ Copper Rainbow Gradient (Torch)

CopperTutorialIntermediateJewelleryDecorative ObjectPatinatorch

紫铜彩虹色梯度（火焰法）/ Copper Rainbow Gradient (Torch)

type:tutorial · level:intermediate · material:copper · variant:torch · scale:jewellery · scale:decorative-object · stage:patina

标签：彩虹色, 梯度, 紫铜, 教程

获得均匀彩虹：①工件彻底去油抛光（氧化膜均匀的前提）②还原焰由边缘向中心缓慢扫热 ③观察色序，在目标色（如蓝）出现即刻移开火焰 ④想做渐变：让一端热、一端凉，自然形成黄→蓝过渡带。难点在"停手时机"——色会随余热继续加深，故达标前略早离火。冷却后膜稳定，可轻封。

For an even rainbow: ①fully degrease and polish (even film needs clean surface) ②sweep the reducing flame from edge to center, slowly ③watch the sequence and pull away the instant the target (e.g., blue) appears ④for gradient: heat one end more, leaving the other cool, for a yellow→blue band. The hard part is timing — color keeps deepening from residual heat, so stop slightly early. Cool; the film is stable, lightly sealable. ---