Heat Coloring Museum Replicas: ΔE Verification
博物馆复制品热着色的色差比对流程
标签：博物馆复刻, 色差, ΔE, 热着色, 验收
博物馆复刻件的热着色验收已从目视转向色差量化：原件取 5 点分光测色（D65/10°），复刻件先在 280 °C 烘炉整体氧化使 ΔL 接近，再局部火焰补 Δa、Δb 偏差，要求整体 ΔE ≤ 4、同件各点间 ΔE ≤ 2。某埃及青铜器复刻项目以此流程将一次合格率从 40% 提升至 85%，单件返工工时由 6 h 降至 1.5 h。关键工具是便携分光色差仪而非手机拍照比色。
Museum replica heat coloring now quantifies color instead of eyeballing: sample the original at 5 points (D65/10°), oven-oxidize the replica at 280 °C to match lightness, then touch up Δa/Δb with a local torch — overall ΔE ≤ 4 and ≤ 2 between points. One Egyptian-bronze replica project lifted first-pass yield from 40% to 85% and cut rework from 6 h to 1.5 h per piece. The key tool is a portable spectrophotometer, not a phone camera. ---