>> I'm working on a 2-colour magazine which contains a 2 colour sponsor's
>> logo on each page, originally created in Corel Draw 9, and exported as
>> an EPS. The spot colour is Pantone 158.
>From your description, the logo is the culprit. Check the Pantone names
>of the color in both CorelDraw and Pagemaker. One may be CV, while the
>other is CVC, for example. Also, CorelDraw is notorious for generating
>questionable EPS files. If you don't have Illustrator, you can pick up
>one of the image conversion utilities that will allow you to redefine &
>rebuild the EPS files to be compatible with Adobe apps.
>Hope this helps.
OK, thanks to everyone's help in both this NG and the Corel NG, I
think I've isolated the problem... Corel Draw is the culprit, and to
some extent so is Distiller.
A reader on the Corel NG pointed me to the Jaws PDF Creator demo - I
tried that and everything works perfectly. I also 'borrowed' a copy of
Illustrator... and the results were interesting here, too.
Here's a summary of my testing, reproduced here for the benefit of
anyone else who is having the same problem. Comments welcome! And
thanks for everyone's help too.
1. In Corel Draw, draw 2 rectangles. Assign a black outline to each.
2. Fill one with a Pantone colour e.g. Pantone 158.
3. Fill the other with a 50% tint of the same colour.
4. Export to EPS.
5. Place into PageMaker and print separations to a PS file; turn page
info on and reduce to fit.
6. Distil the PS file with Acrobat Distiller 3.02 - no Pantone 158 on
the Pantone 158 plate!! Black prints as expected, nothing on C, M or Y
plates as expected.
7. Print the separated file to a PS printer - prints as expected.
8. Distil with Jaws PDF Creator demo - prints as expected.
=> Problem with Acrobat Distiller 3.0.
From step 3:
4a. Export to Adobe Illustrator.
5a. Open in Illustrator. Show the Color palette.
6a. Click on the rectangle with 50% Pantone 158. Move the slider bar
in the Color palette to 100% (thus making the 2 rectangles
theoretically the same colour). Note that the Pantone colours of each
rectangle in the colour swatch in the Color pallette appear visibly
7a. Save as Illustrator EPS. Place into PageMaker. Tints appear as TWO
different colours (Pantone 158 and Pantone 158| 1).
Note: All problems disappear if Pantone colour and its 50% tint are
re-assigned in Illustrator, and the file is exported as EPS and placed
=> Problem with EPS and AI export from Corel Draw.
Conclusion: When saving an EPS or AI file with spot colours Corel Draw
generates faulty Postscript code which is incompatible with both
Distiller and Illustrator.