Layering: Sulfide + Ammonia
多层组合：硫化物 + 氨熏叠加
标签：组合, 叠加, 多层, 进阶
高级做旧常跨体系叠加：先用肝硫做深棕/黑底（建立体积感），再局部氨熏出蓝绿锈，形成"黑底透绿"的经典古铜。**顺序关键**：硫化完成后须先封一层薄蜡隔离，再氨熏，否则氨会干扰硫化层导致发花。也可用硝酸盐做大面积棕底、局部点缀铜绿。叠色完成后整体微晶蜡封护。此法色彩最丰富，适合雕塑与艺术摆件，是本站推荐的进阶路线。
Advanced antiquing layers across systems: first liver of sulfur for a deep brown/black base (builds volume), then local ammonia fuming for blue-green rust, giving classic "green-through-black" antique bronze. **Order matters**: seal a thin wax over the sulfide before fuming, or ammonia mottles it. Alternatively nitrate a large brown base and spot in verdigris. Finish with overall microcrystalline wax. Richest palette — recommended advanced route for sculpture and art objects. ---