Copper & Iron Nitrate Recipes
硝酸盐着色：硝酸铜（绿锈）与硝酸铁（棕色）配方
标签：配方, 硝酸铜, 硝酸铁, 绿锈, 棕色
硝酸盐体系适合大面积与建筑件。常用配方：①**绿锈**：5–10% 硝酸铜 [Cu(NO₃)₂] 水溶液，涂布后保湿，数小时至一天生成绿色碱式硝酸铜/碳酸铜②**棕色**：硝酸铁 [Fe(NO₃)₃] 与硫酸铜按 1:1–2:1 混合（各 5%），加热加速得暖棕③**深色/黑**：提高硝酸铜浓度并多次叠加。要点：铜面必须洁净无油；加热（烘枪或热风）可显著加速；反应后水洗去可溶盐并及时封护。涉及强酸，须防护。
Nitrates suit large and architectural work. Common recipes: ①**green**: 5–10% copper nitrate [Cu(NO₃)₂] in water, applied and kept humid, forming green basic copper nitrate/carbonate over hours to a day ②**brown**: iron nitrate [Fe(NO₃)₃] mixed with copper sulfate 1:1–2:1 (5% each), warmed for a warm brown ③**dark/black**: higher copper nitrate, multiple layers. Keys: surface must be clean and oil-free; heat (heat gun) accelerates markedly; rinse soluble salts and seal promptly. Strong acid — use PPE. ---