Additional pressure applied through the impression cylinder assisting the image transfer to the press sheet.

The back of a bound book; also called the spine.

Printing the reverse side of a sheet already printed on one side.

(1) A strip of paper, printed or unprinted, that wraps around loose sheets (in lieu of binding with a cover) or assembled pieces. (2) The operation of putting a paper band around loose sheets or assembled pieces. (3) Metal straps...

Substance used as a standard for white, in lieu of the availability of a practical 100 percent reflecting diffuser.

An envelope generally used with announcements.

A first color used as a background on which other colors are printed.

Manufactured paper that will be further processed as laminated, Duplex Cover, Bristol Cover, or off machine embossed papers.

In typesetting, the invisible line on which letters and numbers set.

The standard sheet size of a given grade.

The weight in pounds per ream of paper cut to its basic size in inches. A metric system is used outside of North America.

Blender type machine used to pulverize pulp and for mixing additives and color to the stock.

Process of adding sizing material to the pulp in the beater.

A process of perforating, folding, trimming and eventually binding a printed piece.

(1) Attaching sheets into a single unit by adhesives, sewing, stitching, metal prongs, snaps, etc. The operations that comprise collating, perforating, and folding the elements of a form into the finished product. (2) That portion or edge of a book...

The edge where the binding will be done.

In fourcolor process printing, the black plate made to give definition to neutral tones and detail.

In offset lithography, the rubbercoated fabric clamped around the blanket cylinder, which transfers the image from plate to paper.

Unwanted matter that becomes attached to the offset blanket and interferes with print quality.

Movement of the blanket surface that comes in contact with the printing plate or paper.

The printing press cylinder on which the blanket is mounted.

The tack between blanket and paper.

Chemical, usually chlorine, used to whiten pulp.

Chemical treatment to brighten, whiten, purify, refine, and balance pulp fiber.

(1) In printing, printed image that runs off the edges of a page. (2) The migration of ink into unwanted areas.

A printing technique in which a design is pushed forward without foil or ink.

The sticking of piled printed sheets caused by wet ink.

Eliminating portions of negatives by opaquing the image.

Enlargement from the original size.

In printing, a type of photoprint used as a proof. It can be folded to show how the finished printed product will look.

Thicker, visually heavier type vs. thin visually light type. Darker type.

Strong, durable writing paper, consisting of wood, cotton, or both, most commonly used for letterheads, stationery, business forms, etc…

The strength of the paper fibers to resistance of picking or tearing during offset printing.

A general term used to define papers that are most suitable for book manufacture.

A printed piece bound together, containing a few pages.

A technical measurement of the light reflected back from a paper.

A high quality heavy weight paper, sometimes made with cotton fiber prepared or glued together, usually with a caliper thickness of 0.006" and up.

Machine trim or undesirable paper that is returned to the beaters.

An open carton of paper with some of its contents removed.

Sheet thickness. High bulk sheets have fewer sheets per inch than low bulk.

Unprinted sheets of actual paper folded in the signature size and signature number of a given job, to determine bulk.

The point to which paper can withstand pressure without rupturing.

Joining two webs of paper, placing them end-to-end and pasting a strip over and under to make a continuous sheet without overlapping.