Xerox 300x 用户指南

The Dot Gain command is available only in the Expert 
Calibration user mode.  Refer to page 2-9 for instructions on 
selecting this user mode.  

A printing press creates an image with halftone dots.  The round dots of ink 
touch and overlap, covering a percentage of the page. The printed dots 
usually increase in size as they are absorbed by the paper, covering a larger 
area of the page than expected.    

Dot gain is the percentage a printed dot grows from what is expected.  For 
example, if you request 50% Cyan, the printing press may actually cover 
75% of the paper area with Cyan, giving you a 25% dot gain for Cyan.  The 
dot gain may be different for each color ink, typically between 20% and 30%.

Use the Dot Gain dialog box to compensate for dot gain on a specific 
printing press.  Start with a base or standard printing press profile, such as 
Commercial Press or SWOP Press.  The values in the dialog box show the 
dot gain for that profile.  With information from your printing 
representative, or from your own experience, you can change the percentage 
of dot gain for a profile to better match a specific printing press.