1-bit data converting to 8-bit when flattening

[Mike_Jurney@adobeforums.com]

We are experiencing a problem that involves printing from Illustrator CS. We often place or embed 1-bit tiffs (monochrome) at various resolutions as high as 2400ppi. These bitmaps are often used for drop-shadows, text and screens. Our rips "see" these 1-bit files as "line-work" and leave then at there original resolution. The problem is that if Illustrator flattens any of these tiffs they are changed into 8-bit files and our rips "see" them as a "CT" that is then resampled down to "CT" resolution of 300ppi. This will destroy any screen or dither, and leave text to soft. In-order to use transparency on any job that has 1-bit tiffs placed, Illustrator must keep the 1-bit files 1-bit after flattening the file.

Mike Jurney,
Schawk Minneapolis

[Mordy_Golding@adobeforums.com]

Mike,

This is an issue with CCI systems as well. Unfortunately, I'm unaware of anything that can fix this issue. Are you sending EPS files to the RIP directly from AI?

:) Mordy

[Jean-Claude_Tremblay@adobeforums.com]

What happens if you turn off Dual rasterization... Everything will be
send to the Rip higher resolution? just a shot in the dark!!!

JC