Are they 100%K black?

Are you printing in RGB?

Yes RGB, is that a problem, if i need to change it to cmyk should i do this as i create the document or can i do this prior to exporting.

Thanks

Sounds like a printer problem to me

CMYK to print
RGB for digita

Make sure all your images are in the same color format within the PS file. RGB black printed next to CMYK black is several shades different.

CMYK only if you are going to a pro printer, you should be fine leaving everything RGB if it is a personal printer (like an Epson).

ok, thanks, i will try both and let you know how i get on.

Switching to CMYK is not enough!

Go to Edit - Color Settings - choose PrePress and make sure its NOT set to WEB because you will lose half of your colors!

Hope this helps.

It could also be a screen issue. as screens age, they tend to burn/dim-two identical screens from the same company will age differently and can render the same color differently. check it on another screen/machine?

also printing through adobe pdf? will definitely "purple" things out and flatten all the opacity changes.