| 摘要 |
<p>The invention relates to a method for producing distinguishing marks comprising the following steps: printing by photogravure, with a passivation coating, a window on a support comprising a base deposit, primarily a metal deposit; developing the window by means of a physicochemical treatment, particularly by means of an electrolysis, and; washing and drying the support. The invention is characterized in that it consists of regulating the quality of the bath.</p> |
