254

Spire CX250 Color Server User Guide

Imposition

The arranging of pages in a press form to ensure the correct order

 

after the printed sheet is folded, bound and trimmed.

Ink jet proof

A proof of a digital image printed by using jets that squirt minuscule

 

drops of ink. Ink jet proofers can print onto a variety of surfaces.

Job Flow

Job flow refers to the job parameter settings of selected virtual

 

printers that are automatically applied to all jobs printed using that

 

virtual printer. These settings determine how a sent or imported file

 

is processed. For example, a file sent to a virtual printer with a Process

 

& Print job flow will be RIPped, printed and stored in the Storage

 

Folder. A file sent to a Process & Store job flow virtual printer will be

 

RIPped and stored, without printing.

LEF

A printer page orientation, where pages are delivered long edge first.

Laserwriter driver

A part of the Macintosh system software which generates PostScript

 

instructions from an application file when the Print command is

 

activated.

Look-up table (LUT)

A two or three-dimensional array of values stored for specified input- output relationships. When one input value is known, the system can automatically determine the correct output value. For example, the system can find the needed dot size for a given set of printing conditions based on the stored gray level; color setups can be saved in color tables (color transformation tables) which are one of the many kinds of LUTs.

Linework

Linework graphics are characterized by sharply defined lines and very

 

clear transitions from one color to another. Linework is stored in the

 

computer as a series of geometric (vector) drawing instructions.

Metamerism

Metamerism occurs when two colors match under one light source,

 

but appear different under another light source. Those two colors are

 

called a metameric match. A metameric match might cause problems

 

when trying to match proofs to press-sheets under different lighting

 

conditions.

Midtones

Density values of an image (original or reproduction) between the

 

highlights and the shadows. In the reproduction, midtones are

 

printed with dot areas between approximately 40% or 60%. See also

 

Highlights and Shadows.

Page 264
Image 264
Xerox CX240, CX250 After the printed sheet is folded, bound and trimmed, RIPped and stored, without printing, Activated