Process for making decorative or informative patterns on objects made of metal sheets with one or possibly several coatings

摘要

The invention provides a way of producing decorative or informative patterns on objects formed from clad sheet is rejected. One proceeds in such a manner that the outer of the cladding layers is mechanically or chemically removed in the form of desired patterns to at least one of the underlying layers. the article thus obtained with the or the exposed deeper layers in one and the same surface treatment treated, to which the outer and inner layers will react differently then. Advantageously, using as the plating layers of different aluminum purity and applies to the surface treatment, a polishing bath to.