Übersetzung für "True watermark" in Deutsch

A distinction is made between true watermarks which are produced by displacement (so-called light watermarks) or by concentration (so-called shaded watermark) of the fiber pulp using, for example, a dandy roll in the wire section of a paper machine, impressed watermarks, also called Molette watermarks, which are produced by impressing the paper while still wet in the press section of a paper machine, and, finally, imitation watermarks which are made either by imprinting the finished paper outside the paper machine with a colorless varnish or by stamping the finished paper outside the paper machine.