Reply To: InDesign/Prepress Myths

Yes, that's the basic theory, Mike! Of course, few people really know what's going on inside the postscript halftoning engine (much less the APPE), so who knows what it's really doing.

I remember when I was working on Real World Scanning & Halftones (with Steve Roth, Glenn Fleishman, and Conrad Chavez) and after printing the book I noticed that there were some really weird artifacts in many of the books' low-frequency halftones — basically image details that just shouldn't be there according to the halftone theories, image details that fell between halftone cells. Well, I happened upon Chuck Geschke at a conference and showed him the book and he looked closely and told me that he had no idea why PostScript would do that in halftones… it shouldn't!

Sigh.