A watermark is an identifying image or pattern in paper that appears as various shades of lightness/darkness when viewed by transmitted light (or when viewed by reflected light, atop a dark background), caused by thickness or density variations in the paper.Watermarks have been used on postage stamps, currency, and other government documents to discourage counterfeiting.
A watermark is an identifying image or pattern in paper that appears as various shades of lightness/darkness when viewed by transmitted light (or when viewed by reflected light, atop a dark background), caused by thickness or density variations in the paper.Watermarks have been used on postage stamps, currency, and other government documents to discourage counterfeiting.Tags: Essay Prevention Is Better Than CureSchool Assignment CalendarEssay Critical Thinking NursingBusiness Plan FormEssay Child Labour KidsMit Sloan Essays Mba
Faint lines are made by laid wires that run parallel to the axis of the dandy roll, and the bold lines are made by chain wires that run around the circumference to secure the laid wires to the roll from the outside.
Because the chain wires are located on the outside of the laid wires, they have a greater influence on the impression in the pulp, hence their bolder appearance than the laid wire lines.
This embossing is transferred to the pulp fibres, compressing and reducing their thickness in that area.
Because the patterned portion of the page is thinner, it transmits more light through and therefore has a lighter appearance than the surrounding paper.
In philately, the watermark is a key feature of a stamp, and often constitutes the difference between a common and a rare stamp.
Collectors who encounter two otherwise identical stamps with different watermarks consider each stamp to be a separate identifiable issue.At that time the watermark was created by changing the thickness of the paper and thereby creating a shadow/lightness in the watermarked paper.This was done while the paper was still wet/watery and therefore the mark created by this process is called a watermark.The word is also used for digital practices that share similarities with physical watermarks.In one case, overprint on computer-printed output may be used to identify output from an unlicensed trial version of a program.The "classic" stamp watermark is a small crown or other national symbol, appearing either once on each stamp or a continuous pattern. Some types of embossing, such as that used to make the "cross on oval" design on early stamps of Switzerland, resemble a watermark in that the paper is thinner, but can be distinguished by having sharper edges than is usual for a normal watermark.Watermarks were nearly universal on stamps in the 19th and early 20th centuries, but generally fell out of use and are not commonly used on modern U. Stamp paper watermarks also show various designs, letters, numbers and pictorial elements.In another instance, identifying codes can be encoded as a digital watermark for a music, video, picture, or other file.The origin of the water part of a watermark can be found back when a watermark was something that only existed in paper.The process of bringing out the stamp watermark is fairly simple.Sometimes a watermark in stamp paper can be seen just by looking at the unprinted back side of a stamp.