Rag PaperPapers with a complete or partial content of cotton fibers.
Ragged LeftThe term given to right-justified type that is uneven on the left.
Ragged RightThe term given to left-justified type that is uneven on the right.
Railroad BoardA thick, coated paper used for signs; usually waterproof.
Readers PairsTwo consecutive pages as they appear in printed piece.
RectoThe odd numbered pages (right hand side) of books.
Red Lake "C"A common pigment for paste and liquid red inks.
ReducerAny substance that softens and reduces the tack of ink.
ReelThe master roll of paper as it comes off the papermaking machine. It is in its original width and is then cut into smaller rolls.
RegisterThe arrangement of two or more images in exact alignment with each other.
Register MarksAny crossmarks or other symbols used on layout to assure proper registration.
Right Angle FoldA term that denotes folds that are 90 degrees to each other.
Roll To RollA web press printing process where the roll of paper is printed and stored on a roll to be shipped.
Rub ProofThat stage of printed ink where the maximum dryness is achieved, and the ink will not smudge.
RubineA pigment somewhat redder than true magenta.
Run-AroundA term given to copy that accommodates the lines of a picture or other image or copy.
RunabilityA term used to describe how well a paper runs on a printing press.
Running HeadA title at the top of a page that appears on all pages of a book or chapter of a book.
