| 摘要 |
<p>A copper containing component and a manganese containing component are applied onto the surface of a substrate to form a coating having a selected ratio of copper to manganese to form a desired color. Further, color shifting of a multi-component coating upon subsequent heat treatment is minimized or prevented by determining the most mobile species in the coating and then placing a concentration gradient layer of an oxide of that mobile species between the substrate and the coating. Upon subsequent heat treatment, the mobile species in the gradient layer diffuses into the substrate more readily than the mobile species in the coating. Still further, color shifting due to heating, e.g. tempering operations, is minimized by adding calcium to an FeOx system to prevent darkening of the film after heating. An apparatus for forming a graduated coating on a substrate includes o coating station positioned along a conveyor. The coating station includes a first coating dispenser pivotally mounted on a first support and at least one exhaust hood. The first coating dispenser is positioned such that an axis through the delivery end of the first coating dispenser subtends the substrate at a predetermined angle.</p> |
