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How to save .pdf in black mode only

thebill
Registered: Feb 2 2010
Posts: 3

I have generated two pdf's (set in grayscale) flattened and saved in photoshop.

Now when I go to combine the pdf's (front and back), my printer is telling me:

"This pdf is rgb and when we convert it to black only, it makes the black at 94%. I believe you want an 100% black. Can you resave this pdf in black mode only?"

I use CS2 and have Acrobat Standard 8.

Can anyone help please

My Product Information:
Acrobat Standard 8.0, Windows
thebill
Registered: Feb 2 2010
Posts: 3
Anyone?