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It is a shaded watermark first used in 1848 that incorporates tonal depth and creates a greyscale image. Instead of using a wire covering for the dandy roll, the shaded watermark is created by areas of relief on the roll's own surface. Once dry, the paper may then be rolled again to produce a watermark of even thickness but with varying density.
A rare flaw in paper is when the watermark bit has been improperly repaired on the Dandy roll. Great Britain's Emblems watermark is composed of two roses, one shamrock and one thistle. A defect was created when the Dandy roll was repaired and instead of a thistle bit, a rose bit was added creating the three roses and a shamrock flaw. This flaw ...
Modern papermaking techniques use a dandy roll to create the laid pattern during the early stages of manufacture, similar to the way a watermark is added to handmade papers. While in the wet state, the paper stock (a dilute dispersion of the cellulose fibers in water) is drained on a wire mesh to de-water the stock.
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The Tudor crown watermark was replaced because the dandy roll was worn, and the St. Edward's Crown watermark was replaced because of the introduction of Scottish regional issues and perceived sensitivities as Elizabeth was the first Elizabeth to rule Scotland not the second. [8] [9]
To the family's surprise, Jelly Roll, 39, later weighed in, writing, "Maybe the best video ever LOL," in the comments before reposting the video on his own page. His wife, 44, also commented ...
dandy roll: a mesh covered hollow roll that rides on top of the Fourdrinier. It breaks up fiber clumps to improve the sheet formation and can also be used to make an imprint, as with laid paper . See also watermark .