Laser Heat Coloring: Selective Local Oxidation
激光热着色：选择性局部氧化
标签：激光, 选择性氧化, 热着色, 干涉色, 数控, 精准
数控激光在紫铜上做局部热氧化：1064 nm、20–60 W、扫描 100–400 mm/s，通过功率与速度组合控制氧化膜厚度获得干涉色（蓝紫约 30–40 nm、金黄约 15–20 nm）。扫描行距取光斑直径 30–50%，行距过密热量叠加导致发黑。适合首饰与艺术板的文字、渐变图案着色，重复性远优于手工火焰；完成后立即涂蜡封护防止继续氧化。
CNC lasers give selective thermal oxidation on copper: 1064 nm, 20–60 W, 100–400 mm/s, with power-speed combinations setting oxide thickness and thus interference colors (blue-violet ~30–40 nm, gold ~15–20 nm). Space scan lines at 30–50% of spot diameter — tighter spacing stacks heat and burns to black. Ideal for lettering and gradient artwork on jewelry and panels, far more repeatable than hand-torch work. Wax-seal immediately after coloring. ---