We are getting alot of this in our prepress departemet lately

Topic
Thick and Thin Text

Mordy Golding - 11:49am May 23, 2001 Pacific

QUESTION:
Why is some of my text thick and some thin when I print my Illustrator 9 document?

ANSWER:
Solution:

Your Quality/Speed slider setting (in Document Setup) is probably not high enough. When a file containing transparency effects is printed, the file is broken down into pieces (or “flattened”), with some objects being printed as vector and some as raster. The Quality/Speed slider tells Illustrator how much of the file should stay vector and how much should be rasterized. Choose File>Document Setup and choose the Transparency option from the pop-up button at the top of the palette. Moving the Quality/Speed slider to the position farthest to the right will tell Illustrator to keep all objects in vector format where possible, and should ensure that your file prints correctly. For more information on the Quality/Speed slider, read the High-Resolution Printing & Export Quick Reference Guide, or the Printing & Export White Paper.