pdf colours going dull.

[zeb]

:hi: Hi. I need somthing printed. I have done the artwork in illustrator, and when i save the file as a pdf the colours go really dull. So the colours in illustrator are bright. But when I open the pdf in adobe reader the colours go dull. Does anyone know why this may be happening? http://i29.photobucket.com/albums/c258/Zeb_raa/colour.jpg
example of the colour difference.

[senders]

are the colours all the same? all spot of cymk? or it could be the PDF settings, you can set it to print when you save it in illustrator.
but i would check if everything i used is in the same colour mode, spot colours or cymk. then save it to a print pdf.
but as far as i know there is usually a small difference in colour, and it is gonna look a bit different once you print it. or press it.

[visualriddle]

I'm having this same problem. My black when saved as a pdf comes out grey. I've tried every possible configuration in InDesign as well as Acrobat. I have the settings the same as another computer which works fine.

I think it's inherent in the monitor settings, but I cannot fix it, and it's causing a lot of problems.

[Aen]

When you work in RGB, be sure to convert everything to CMYK for press. Are you using transparencies? be sure to flatten them.

As for Black...

Images: make sure your source images are in greyscale mode. If your black contains CMY, it'll not very black.
Art: You can set the color toCMYK C0 M0 Y0 K100 or to greyscale K100.

Make sure your preview settings in Acrobat are good, so it shows higher quality on screen.