
1) American musical duo 2) Authentication method 3) Line 4) Paper impression 5) Stationery logo 6) Water line
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https://www.crosswordclues.com/clue/watermark

- a line marking the level reached by a body of water
- a distinguishing mark impressed on paper during manufacture; visible when paper is held up to the light
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• (n.) A mark indicating the height to which water has risen, or at which it has stood; the usual limit of high or low water. • (n.) A letter, device, or the like, wrought into paper during the process of manufacture. • (n.) See Water line, 2.
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http://thinkexist.com/dictionary/meaning/watermark/

Translucent letters or a design in a sheet of paper. Usually can be seen only by holding the sheet to the light.
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http://www.alibris.com/glossary/glossary-books

design produced by creating a variation in the thickness of paper fibre during the wet-paper phase of papermaking. This design is clearly visible ... [1 related articles]
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http://www.britannica.com/eb/a-z/w/14

Distinctive design created in paper during manufacture.
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http://www.e-printing.co.uk/glossary.htm

Design formed by differing thickness of paper during production; often used as security device in paper money.
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http://www.encyclo.co.uk/local/10143

(In topic `Knowledge, Document, Workflow & Content Management`) Watermark Software`s Windows-based application that integrates scanned paper documents with e-mail and databases.
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http://www.encyclo.co.uk/local/20477

<botany> A line on vegetation or other upright structures that represents the maximum height reached in an inundation (flooding) event. ... (09 Oct 1997) ...
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http://www.encyclo.co.uk/local/20973

Bits altered within an image to create a pattern which indicates proof of ownership. Unauthorized use of a watermarked image can then be traced
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http://www.encyclo.co.uk/local/21048

A deliberate design or pattern in paper which is visible when viewed by transmitted light or against a contrasting background, made by a dandy roll at the wet end of the papermaking machine.
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http://www.encyclo.co.uk/local/21179
Wa'ter·mark` noun 1. A mark indicating the height to which water has risen, or at which it has stood; the usual limit of high or low water.
2. A letter, device, or the like, wrought into paper during the process of manufacture. » 'The watermark in paper is produced by bending the...
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http://www.encyclo.co.uk/webster/W/15

A faint design made in some paper during manufacture, visible when held against the light, identifying the maker
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http://www.ifla.org/VII/s30/pub/mg1.htm#5

Bits altered within an image to create a pattern which indicates proof of ownership. Unauthorized use of a watermarked image can then be traced.
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http://www.rodsmith.org.uk/photographic%20glossary/rods%20photographic%20gl

A design created in paper that can be easily seen by holding the paper up to a light. An optional feature found on some single sided business cards.
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http://www.translationdirectory.com/glossaries/glossary292.php

[
n] - a distinguishing mark impressed on paper during manufacture
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http://www.webdictionary.co.uk/definition.php?query=watermark

Translucent logo in paper created during manufacturing by slight embossing from a dandy roll while paper is still approximately 90 percent water.
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https://www.encyclo.co.uk/local/20631

A watermark is a design which is impressed into the paper when it is formed on the wire of the paper making machine. The design is carried by the dandy roll and is slightly proud of its surface. The slight pressure which is applied reduces the thickness of the paper, and when dry shows through, because it is less opaque.
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https://www.encyclo.co.uk/local/20867

An image or mark in a sheet of paper visible when viewed by transmitted light. It is created using a pattern of wire sewn into the mould on which the sheet of pulp is dried; the paper which settles above the wires is thinner, and so more translucent. The image usually represents the papermaker's trademark design or logo, sometimes with a name, init...
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https://www.encyclo.co.uk/local/20873
noun a line marking the level reached by a body of water
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https://www.encyclo.co.uk/local/20974
noun a distinguishing mark impressed on paper during manufacture; visible when paper is held up to the light
Found on
https://www.encyclo.co.uk/local/20974

A translucent logo that is embossed during the papermaking process while the paper slurry is on the dandy roll. Reference, dandy roll
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https://www.encyclo.co.uk/local/22539

A faint background image on a printed piece or included in digital files as a security feature (such as on printed currency or checks) or to denote a copyright of an image. An identifying mark or symbol embedded in the substrate on which the art is made, usually referring to the maker of the substrate.
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https://www.xrite.com/learning/other-resources/glossary
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