watermark

     

A watermark is a recognizable image or pattern in paper that appears lighter when viewe by transmitted light (or darker when viewed by reflected light, atop a dark background). There are two main types of watermark, the Dandy Roll process, and the more complex Cylinder Mould process. A watermark is very useful in the examination of paper because it can be used for dating, identifying sizes, mill trademarks and locations, and the quality of a paper.

Trivia about watermark

  • During papermaking a dandy roll presses these into the paper & you can see them by holding the paper up to a light
  • This design is pressed into paper by wires in the mold
  • This translucent identifier in paper is made by pressing a wire pattern into the paper while it's still wet
  • (Kelly of the Clue Crew shows a stamp on the monitor.) In the authentication process of certain stamps, detection fluid is applied to the back, revealing this type of transparent impression
  • This identifying design pressed into some paper products dates back to late 13th century Italy

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