Some Fonts Are in Bold When Printing a PDF.
Cause
Target options: All controllers
The text in the areas where the problem occurs has transparency effects applied.
If processing using the PS Driver and CPSI, those sections with transparency effects applied are processed as image data, and the fonts appear as if in bold.
Setting Procedure
Work Time: 5 mins or less
Printing with APPE allows those sections with transparency effects applied to be printed as text.
The APPE option is required.
The following procedure shows an example for the Fiery color server.
1
After importing the PDF file to Command WorkStation (CWS), open [Properties] for the job.
2
Add a check to the [Adobe PDF Print Engine Preferred] check box, and then print.
in the upper-right of a page, it turns into 
and is registered as a bookmark.