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Rag Paper: Papers with a complete or partial content of cotton fibers.
Ragged Left: The term given to right-justified type that is uneven on the left.
Ragged Right: The term given to left-justified type that is uneven on the right.
Railroad Board: A thick, coated paper used for signs; usually waterproof.
Raster Image Processor (RIP): In computer imaging, the computerized process that results in an elctronic bit map which indicates every spot position on a page in preparation for an actual printout.
Reader's Spread: Two consecutive pages as they appear in printed piece.
Ream: 500 sheets of paper.
Reducer: Any substance that softens and reduces the tack of ink.
Register: The arrangement of two or more images in exact alignment with each other.
Register Marks: Any crossmarks or other symbols used on a layout to assure proper registration.
Resolution: The quantification of printout quality using the number of spots per inch.
RGB: Red, Green, Blue - additive primary colors.
Right Angle Fold: A term that denotes folds that are 90 degrees to each other.
Roll To Roll: A web press printing process where the roll of paper is printed and stored on a roll to be shipped.
Rub Proof: That stage of printed ink where the maximum dryness is achieved and the ink will not smudge.
Run-Around: A term given to copy that is set to fit aound a picture or other image or copy.
Runability: A term used to describe how well a paper runs on a printing press.
Running Head: 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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