| 摘要 |
<p>The present invention relates to a method for preparing an artificial patina paste to substrates, preferably made from copper or copper alloys and a patina paste. The raw material is a copper salt, which react with an alkali metal hydroxide. The precipitate is dispersed with powerful mixing and an addition of a dispersing agent. An oxidative agent like manganese dioxide is used, and carbon is used as an agent for catalysing natural patina forming. The invention relates also the patina pasta, in which alkyd-based compound is used as a binder.</p> |
