Cylinder mould watermark
The Cylinder mould made watermark is considered to offer the highest security of any watermark type. It is a three-dimensional watermark giving beautiful clarity and high image definition. In cylinder mould papermaking, the watermarks are created as the paper is formed. The resulting watermark has exceptional, multi-tonal detail because the watermark is formed as an intrinsic part of the paper sheet. High quality cylinder mould watermarks, such as those made here at Portals, are virtually impossible to simulate effectively.
Fourdrinier watermarks, conversely, are more common and are less complex to produce. The fourdrinier method of watermarking creates a simple dual-tone, high contrast feature. In this process, the paper is mostly formed before the watermark is created with an impression roll, known as a dandy roll, embossing the watermark design into the wet paper sheet. Fourdrinier watermarks are generally considered easier to replicate and therefore less secure than its Cylinder Mould alternative.