Recipe: Patina and Colouring After Imprinting
压印后的做旧与上色配方
标签：压印做旧, 硫化钾, 渐变上色, 封护蜡, 纹理凸显
压印后的凹凸最适合用做旧凸显。配方：硫化钾（K₂S）溶液按 1:20 兑温水，将铜件浸泡 1–3 分钟得到棕黑硫化层，凹陷处因积液更深、凸起处较浅，自然形成立体渐变；随后清水洗净、干后涂 Renaissance 蜡或透明指甲油封护。注意硫化物有臭鸡蛋味且有毒，须通风、戴手套，废液不可直排。
Imprinted relief shows best with patina. Recipe: potassium sulfide (K₂S) at 1:20 in warm water; soak the copper 1–3 min for a brown-black sulfide layer. Recesses hold more solution and go darker, highs stay lighter, giving natural 3-D gradient. Rinse, dry, then seal with Renaissance wax or clear lacquer. Note: sulfides smell of rotten eggs and are toxic—ventilate, glove up, never pour waste down the drain.