[OS X TeX] Illustrator to printing shop via pdflatex

[André Bellaïche]

Dear all,

I have some black or gray level Illustrator EPS files, included in a  
book via pdflatex. I use \usepackage{epstopdf} to convert them into PDF.

Unfortunately, there is no gray level mode in Illustrator. You have to  
choose between RGB and CMYK.

Moreover, when the author of the image has left checked the box  
"Display all the blacks as intense black" (I don't know exactly the  
English formulation, I have a French version), some CMY colors may be  
added to the black.

For one reason or another (RGB mode, CMY colors added to a black  
stroke, some profile added by epstopdf...), at the end, you get a  
message from the printing shop : ``your pdf file contains colour  
images''.

Does anybody knows the good procedures :

- to get rid of the colour added in black strokes (in one only time) ;
- to save an Illustrator file in order that it is considered as a grey  
or black only file by epstopdf (or Distiller), and by all applications  
wihich may have to deal with the output file?

I use Illustrator CS3.

Thank you for any help.

André

P.S. I have similar problems with Photoshop. This will be the subject  
of anaother post.