Nitrate: Spraying & Multi-layer
硝酸盐：喷涂与多层叠加
标签：喷涂, 多层, 叠加, 教程
建筑板与大型雕塑常用喷涂法：将硝酸溶液装入喷壶，薄雾多次喷涂（每层干后再喷），比刷涂更均匀、无色刷痕。多层叠加技巧：先喷浅棕打底→局部喷深棕→边缘点绿，形成自然层次；层间可用清水轻喷做出"流痕"仿旧效果。注意：单次喷涂过厚会流挂；叠加后必须彻底水洗去盐并封护，否则日后泛白粉化。
Panels and large sculpture often use spraying: load nitrate solution in a sprayer and apply thin mist coats, letting each dry, for a more even result than brushing. Layering: light brown base → local dark brown → green at edges for natural depth; mist water between layers for "run" antiquing effects. Caution: one heavy coat runs; after layering rinse salts thoroughly and seal or it blooms white later. ---