Glossary of Printing

Art:  All copy used in preparing a printed piece

Bleed:  Enlargement of the borders of an illustration so that after printing and trimming to size, the desired margins will be flush with the edge of the sheet or page

Blueline:  This is a proof that shows exact color breaks in varying shades of blue on white paper

Break for Color:  To separate parts to be printed in different colors

Camera Ready:  Copy and/or art ready to be photographed

Color Correction:  Adjustments of color values in the reproduction process used to ensure a correct image

Color Keys:  Off-press overlay proofs using 3M materials

Color Separation:  The conversion of a color photograph or drawing into its component spec tral colors: cyan, yellow, magenta and black (CYMK), with one screened negative produced per color

Contact Screen:  A screen that photographically produces a dot pattern on films and plates to create halftone negatives

Continuous Tone:   A photograph containing gradient tones from black to white

Copy:  All text, photographs and other visuals used in a printed piece

Cromalin:  Brand name of DuPont materials used to make off-press color proofs

Crop:  To trim portions of a photograph or other visual element

Cyan:  A shade of blue ink used in four-coloring printing

Desktop Publishing (DTP):  The use of a PC in the creation of fully composed pages, com prised of text and graphics, using off-the -shelf application software that outputs to a laser printer (or other output device) which is typically driven by PostScript (a device-independent page description language).

Dot:  Halftones are composed of dots

Drop-out:  Parts of originals that will not produce

Dummy:  Preliminary layout showing positions of text and illustrations

Film Negative:  A photographic negative which reverses light and dark areas

Folio:  The page number

Fonts:  A complete set of characters in a single typeface. The character set for Times Roman, Times Italic and Times Bold Italic are each different "fonts", comprising a "type family"

Font Size:  The size of a font, measured in points, from the lowest descender to the highest ascender

Gathering:  The assembling of folded signatures in proper sequence

Galley Proof:  A proof of text copy before it is made into pages

Gutter:  The blank space from the printing area to the binding. Also known as inner margin

Halftone:  The reproduction of continuous-tone photographs by a mechanical or electronic process that converts the image into dots of various sizes

Imposition:  The positioning of pages for large press sheets so that when cutting and fold ing is complete the images will be in the correct sequence

Insert:  A printed piece that is inserted into a newspaper, magazine or other printed piece

Keyline:  An outline drawing that shows the size and position of illustrations and half-tone images

Layout:  The placement of elements, such as text and graphics, on a page

Light Table/Box:  Table or box with a glass surface that is illuminated from below, used for making transparencies, stripping, retouching or viewing photographic work

Line Copy:  Copy that can be reproduced without a halftone screen

Magenta:  A red ink used in four-color printing

Mechanical:  Camera-ready copy art

Mock-up:  A rough representation of a printed piece or design indicating size, color, typestyle and other graphic elements

Moire:  The crisscross pattern that appears on color illustrations that are not correctly separated

Off Press Proof:  Photomechanical or digitally produced proofs that cost less and take less time than regular press proofs

Overlay:  A transparency used to indicate color breaks, instructions and corrections

Overlay Proof:  An off-press color proof

Outsert:  Any additional printed piece included in a polybag and mailed with the host publication

Pagination:  Numbering the pages of a book, newspaper or periodical

Pantone Matching System:  The trade mark name for a system of color matching in materials like inks, papers and markers

Paste-Up:  See mechanical

Perfect Binding:  Books that are bound by glue rather than having pages that are sewn in or stapled

Photo Mechanical Transfer:  Mechanically produced photoprints taken from originals to use in paste-ups and presentations

PMS:  See Pantone Matching System

PMT:  Photomechanical transfer

Position Proof:  Color proof used by printer to check position, layout and/or color breakouts

Process Colors:  The four colors of printing inks: cyan, magenta, yellow and black

Proof:  An impression made from an inked plate, stone, screen, block, or type made to check the accuracy of the piece about to be produced

Register:  To put two or more pages in exact alignment

Register Marks:  Crosses drawn on original copy before photography to indicate color registration and/or negative positioning

Rubylith:  A brand name for sheets of colored membrane on acetate that can be cut to shape to mask irregular areas of artboards

Saddle Stitch/Wire:  A method of assembling brochures in which the pages are opened over a saddle-shaped support and stitched through the back

Signature:  In printing and binding, the name given to a printed sheet after it's been folded

Stock:  The paper to be printed on

Stripping:  Assembling two or more photographic images to produce a composite

Tint:  Various even tone areas (strengthens/percentages) of a solid color

Tissue Overlay:  Thin transparent paper placed over artwork to indicate color breaks and corrections

Trim Marks:  Marks that indicate the edge of the page

Velox:  A print made from a screen negative

-Up:  two-up, three-up, etc. denotes that a piece is being printed on a larger size sheet in order to take advantage of a full press

SIG Editors Manual
Updated November 1993

Lifelong Learning

ACM offers lifelong learning resources including online books and courses from Skillsoft, TechTalks on the hottest topics in computing and IT, and more.


ACM Case Studies

Written by leading domain experts for software engineers, ACM Case Studies provide an in-depth look at how software teams overcome specific challenges by implementing new technologies, adopting new practices, or a combination of both. Often through first-hand accounts, these pieces explore what the challenges were, the tools and techniques that were used to combat them, and the solution that was achieved.