Glossary of Terms

Like any industry, ours uses a variety of terms. If you want to find out what they mean, you are in the right place! Simply click on a letter to see its list of terms. If the term you are looking for isn't listed in our glossary feel free to contact us so that we may help you as well as add it to our list.

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1. The cover surrounding a completed casebound book. 2. The paper cover sometimes called the "dust cover" of a hardbound book.

Jet Black

A reference to the degree of an ink's or material's blackness.

Job Jacket

The documentation detailing the production requirements of an order. Besides specifications, the documentation may include photographs, electronic media containing files, etc.

Job Number

A number assigned to a printing project used for record keeping and job tracking. Also used to retrieve old jobs for reprints or reworking by customer.


To vibrate a stack of finished pages so that they are tightly aligned for final trimming.


Vibrating, sloping platform that evens up the edges of stacks of paper.


That bendable, hinge-like part of casebook where the cover and spine meet. Other Term: hinge.

Joint Photographic Experts Group

In computing, a .jpeg (pronounced jay-peg) is a commonly used standard method of lossy data compression for photographic images. The file format which employs this compression is commonly called .jpg; the most common file extensions for this format are .jpeg, .jfif, .jpg, or .jpe although .jpg is the most common on all platforms.

JPEG itself specifies only how an image is transformed into a stream of bytes, but not how those bytes are encapsulated in any particular storage medium. A further standard, created by the Independent JPEG Group, called .jfif, specifies how to produce a file suitable for computer storage and transmission (such as over the Internet) from a JPEG stream. In common usage, when one speaks of a "JPEG file" one generally means a .jfif file, or sometimes an Exif JPEG file. There are, however, other JPEG-based file formats, such as jng. .jpeg/.jfif is the most common format used for storing and transmitting photographs on the World Wide Web. It is not as well suited for line drawings and other textual or iconic graphics because its compression method performs badly on these types of images.

Abbreviation: JPEG
File Extensions: .jpeg, .jpg, .jfif, .jpe, .jif, .jiff
See Also: (GIF) Graphics Interchange Format, (PNG) Portable Network Graphics, (TIFF) Tagged Image File Format


In typesetting, justification or alignment, is the horizontal positioning and alignment of text or images within a line, typically relative to a column. There are four main types of justification, left justification, right justification, center justification and full justification.
Another type of justification sometimes used in tables is the alignment on a specified character, for instance a decimal point.
See Also: Flush Left, Flush Right, Ragged Left, Ragged Right, Vertical Justification, Word Spacing


Burlap fibers. Used to produce strong and durable paper.

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