Xerox Phaser EX7750 参考指南

Until recently, most color printing was done on printing presses using one of several 
printing techniques—

, to name a few. All 

traditional printing techniques require lengthy preparation before a press run can take 
place. Short-run color printing, including Color Server printing, eliminates most of 
this preparation. By streamlining the process of color printing, the Color Server makes 
short print runs economically feasible.

In contemporary offset lithographic printing, digital files from desktop computers are 
output to an 

, which creates film separations. The film is used to make a 

, which is an accurate predictor of the final print job and allows you to 

make corrections before going to press. Once the proof is approved, the printer makes 
plates from the film and runs the print job on the press. 

With the Color Server, you simply print the file. The Color Server processes the 

magenta, yellow, and black) to the printer. The ease of Color Server printing makes 
possible experimentation that would be too costly on a press, allowing unlimited fine-
tuning of color and design elements.

Halftoning is used in offset printing to print each process color at a different intensity, 
allowing millions of different colors to be reproduced using only the four process 
colors. Depending on the required intensity of a given color, toner is placed on paper 
in dots of different size. The grid of dots used for each toner color is called a screen. 
Halftone screens are aligned to unique angles designed to eliminate interference 
patterns called 

 that can arise with halftoning. 

Some color printers are commonly referred to as 

They do not use traditional halftone screen patterns and angles. Contone devices are 
capable of varying the intensity of individual dots.