changing 4 color black to 100% black

[TimStefko@adobeforums.com]

I am receiving pdf files that have black type as 4 color. When I go to Touchup text attributes to change the black in CYMK slider to 100% K the black stays 4 color. What gives?
(I'm using Acrobat 7.0 also I don't have PitStop)

[Aandi_Inston@adobeforums.com]

You cannot set CMYK colors, though the Macintosh fools you into
thinking that you can. You can only set RGB - the Mac translates.

Aandi Inston

[pjonesCET@adobeforums.com]

Explain why you can't with a Mac and can with a PC ? Though I am not into Printpress (only reason You would deal with CMYK anyway) I and others would like to know why?

[Aandi_Inston@adobeforums.com]

The colour picker on Windows doesn't show CMYK at all. It's only Mac
OS that does.

Aandi Inston

[pjonesCET@adobeforums.com]

Does that mean neither, PC or Mac deals with CMYK, It just that the Mac appears to show it.

[peter kleinheider]

Hi pjonesCET

This is correct. The TouchUp tools only handles RGB - no matter which color chooser you are using.

The edit color in CMYK/Spot/ICCbased/... you need 3rd party tools.

rgds

Peter

[John_Slate@adobeforums.com]

Tools>Print production>Convert colors

•uncheck "preserve black" in Conversion options

•select "don't include profile" in Conversion options

•set to gray gamma 1.8 or 2.2 for destination

You may need to run this a couple of times depending on PDF content vis-a-vis the Document colors section at the top of the dialog, and choosing the appropriate action