Xerox CX250 User Manual

108

 Chapter 7– Color Workflow

Calibration Overview

One of the most important issues in obtaining satisfactory print quality is 
steady toner density. Toner density is affected by many factors such as 
heat, humidity, and service settings. You should perform a daily 
calibration to compensate for these factors. 

The calibration process corrects the printer colors by measuring their 
density and creating calibration look-up tables. The Spire CX250 color 
server uses the data in these tables to compensate for the differences 
between the actual, measured density and target levels; the target density.

You should perform calibration in the following instances:

When you use a new paper stock

At least once every eight hour shift for every combination of paper 
stock and screening method used

When prints show “color casts”

After machine maintenance or hardware changes—for example, 
replacing a photoreceptor

On drastic ambient changes (temperature and humidity) 

There are two types of calibration:

Scanner calibration, see Scanner Calibration on page 109

Calibration using the X-Rite

®

 DTP34 QuickCal densitometer (this 

option is available only if you have the Pro configuration), see 
Calibrating with the X-Rite DTP34 QuickCal Densitometer on page 112

Important:  Perform a different calibration for every combination of media and 
screen type you are going to use for printing. When calibrating, always use the 
same media that you intend to use for printing.