PROCESS FOR COLOURING THE SURFACE OF METALLIC MATERIALS AND PRODUCTS OBTAINED BY ITS USE

摘要

Process for colouring the surface of metallic materials by forming a film of oxides, and the products thus obtained. The material to be coloured is subjected to a surface treatment using low-temperature plasma in an atmosphere comprising at least one gas whose molecule contains oxygen atoms. The invention applies chiefly to the colouring of metal plates and sheets, especially those made of stainless steel.