Concave Patina & Sealing (Sulfide Colouring)

凹面做旧与封护（硫化着色）

type:recipe · level:intermediate · material:copper · material:silver · variant:sulfide · variant:thermal-oxide · scale:jewellery · scale:decorative-object · equipment:hand-tools · stage:patina · stage:sealing

标签：做旧, 硫化, 封护, 凹面, 着色

凹面件可用硫化钾（K₂S）稀溶液快速做旧呈黑灰层次，凸显凹凸光影。操作：工件洗净脱脂，浸入或涂刷硫化液数秒至数十秒，流水冲净，软布抛光高光处。最后涂微晶蜡或丙烯酸清漆封护，防止继续氧化。注意硫化液有异味且勿接触皮肤伤口。

Concave pieces can be quickly antiqued with dilute potassium sulphide (K₂S) for a black-grey relief that accents light and shadow. Degrease the work, dip or brush the solution for seconds to tens of seconds, rinse, then buff the highs. Seal finally with microcrystalline wax or acrylic lacquer to halt oxidation. Note K₂S smells and must not touch broken skin.