One side of a leaf.

Page Count
Total number of pages in a printed document.

The numbering of individual pages in a multi-page document.

Pantone Matching System
The American standard color matching system used by most graphic designers and printers. A true Pantone (PMS) color is defined by a mixture of inks that will provide a specific color.

Any paper with a thickness (caliper) of 12 points (.3mm) or more.

A high-grade soft paper used for personal stationery because it accepts handwriting well.

A hard finished paper that emulates animal skin; used for documents, such as awards, that require writing by hand.

Parent Sheet
A sheet that is larger than the cut stock of the same paper.

Paste Ink
An ink having a high level of viscosity.

Perf Marks
Markings usually dotted lines at edges showing where perforations should occur.

Perfect Bind
A bindery method common in paperback books and magazines. After the printed sections having been collated, they are clamped together and a cover is wrapped around the spine. The pages are attached to the cover using a flexible adhesive.

Perfecting Press
A printing press that prints on both sides of the page in a single pass.

Punching small holes or slits in a sheet of paper or cardboard to facilitate tearing along a desired line. Usually a straight line.

Making printing plates by exposure of line and halftone negatives on sensitized metal, converting the image into an acid resist, and etching the print to the relief required for letterpress printing.

The platemaking process where plates are coated with photosensitive coatings and exposed to photo negatives or positives.

A photographic print creating an image using photography and electrostatic process; also called a stat.

Standard of typesetting measurement, 1/6 inch. 1 pica = 12 points 72 points = 1 inch.

The effect of ink being too tacky and lifting fibers out of the paper, leaving spots on the printed surface. 

A build up of pigment or paper coatings onto the plate, blankets or rollers.

Plastic Comb
A method of binding books where holes are drilled on the side closet the spine, and a plastic piece is inserted to hold the pages together.

A flat sheet of metal or other material used in a offset printing press for producing images.

Abbreviation for Pantone Color Matching Systems.

A measurement unit equal to 1/72 of an inch. 12 points to a pica, 72 points to an inch.

An upright image or page where the height is greater than the width.

Pixels per inch

Any paper that is considered better than #1 by its manufacturer.

Press Check
Event at which makeready sheets from the press are examined before authorizing full production to begin.

Press Proof
Actual press sheet to show image, tone values, and colors as well as imposition of frame or press-plate.

Primary Colors
In printing the four primary colors are cyan (blue), magenta (red), yellow, and black.

Printers Pairs
Two consecutive pages as they appear on a flat or signature.

Printer Spreads
Mechanicals made so they are imposed for printing, as compared to reader spreads.

Process Inks
Printing inks, usually in sets of four colors. The most frequent combination is yellow, magenta, cyan, and black, which are printed one over another in that order to obtain a colored print with the desired hues, whites, blacks, and grays.

Process Lens
A high quality specialty lens made for line art, halftone and color photography.

Process Printing
Printing from two or more half tones to produce intermediate colors and shades.

Progressive Proofs
Any proofs made from the separate plates of a multi-plate-printing project.

Impression from composed type or blocks, taken for checking and correction, from a lithographic plate to check accuracy of layout, type matter, tone, and color reproduction.