Gilding Restoration in the Hall of Supreme Harmony
太和殿内檐鎏金修复工程
标签：故宫, 太和殿, 鎏金修复, XRF检测, 可识别修复
故宫太和殿龙椅、屏风与藻井蟠龙柱大量使用清中期火法鎏金，2005–2008 年大修系统检测：XRF 显示鎏金层厚 3–6 μm、含金 68–74%，符合清代"库金"配比。修复遵循"可识别、最小干预"：露铜区以传统汞齐法小面积补鎏，含汞废气经捕集装置与活性炭处理；大面积暗淡区仅以去离子水与中性皂棉擦洗后涂封护蜡，不做整体重鎏，保留历史包浆与磨损信息。
The throne, screens and dragon columns of the Hall of Supreme Harmony carry mid-Qing fire gilding, surveyed during the 2005–2008 restoration: XRF showed 3–6 μm layers at 68–74% Au, matching Qing "ku jin" alloy. Work followed identifiable, minimal-intervention rules—exposed copper was re-gilded by amalgam in small patches with mercury vapor captured through activated-carbon scrubbing; dull areas got only DI-water and neutral-soap swabbing plus protective wax, keeping historical patina and wear intact. ---