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Rag Paper
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Papers with a complete or partial content of cotton fibers.
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Ragged Left
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Type that is justified to the right margin and the line lengths vary on the left.
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Ragged Right
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Type that is justified to the left margin and the line lengths vary on the right.
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Rainbow Fountain
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Technique of putting ink colors next to each other in the same ink fountain and oscillating the ink rollers to make the colors merge where they touch, producing a rainbow effect.
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Raster Image Processor
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Device that translates page description commands into bitmapped information for an output device such as a laser printer or imagesetter, generally referred to as a RIP.
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Reader Spread
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Mechanicals made in two page spreads as readers would see the pages, as compared to printer spread.
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Ream
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500 sheets of paper.
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Recto
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The odd numbered pages (right hand side) of books.
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Recycled Paper
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Paper produced meeting the EPA guidelines requiring a minimum of 30% post-consumer content for uncoated printing and writing paper, and a minimum of 10% post-consumer content for coated papers.
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Reducer
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A substance that softens and reduces the tack of ink.
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Reel
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The master roll of paper as it comes off the papermaking machine. It is in its original width and is then cut into smaller rolls.
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Register
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To position print in the properly relative to the edge of the sheet and to other printing on the same sheet.
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Register Marks
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Any crossmarks or other symbols used on layout to assure proper registration.
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Repeatability
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Ability of a device, such as an imagesetter, to produce film or plates that yield images in register.
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Resolution
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Sharpness of an image on film, paper, computer screen, disc, tape or other medium.
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Reverse
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Type, graphic or illustration reproduced by printing ink around its outline, thus allowing the underlying color or paper to show through and form the image. The image 'reverses out' of the ink color. Also called knockout and liftout.
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RGB
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Abbreviation for red, green, blue, the additive color primaries.
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Right Angle Fold
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A term that denotes folds that are 90 degrees to each other.
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Right Reading
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Copy that reads correctly in the language in which it is written. Also describes a photo whose orientation looks like the original scene, as compared to a flopped image.
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Rosette
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The formation created by the dots, cyan magenta yellow and black, that make up four-color images. Because the dots are not perfectly round and they’re turned at angles to each other, the cluster resembles the arrangement of petals in a rose.
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Rotary Press
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Printing press which passes the substrate between two rotating cylinders when making an impression.
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Round Back Bind
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To casebind with a rounded (convex) spine, as compared to flat back bind.
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Rule
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Line used as a graphic element to separate or organize copy.
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Ruleup
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Map or drawing given by a printer to a stripper showing how a printing job must be imposed using a specific press and sheet size. Also called press layout, printer's layout and ruleout.
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Run
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Refers to the quantity printed.
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Run-Around
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A term given to copy that accommodates the lines of a picture or other image or copy.
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Runability
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A term used to describe how well a paper runs on a printing press.
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Running Head
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A title at the top of a page that appears on all pages of a book or chapter of a book.
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