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jacquelineo32907175
Participant
May 12, 2017
Question

How can the convert colors tool be used to make all colored lines/object just simply black?

  • May 12, 2017
  • 1 reply
  • 397 views

I would like to take the PDF I have that was output a long while back, where I can't go back to the source, and simple use Acrobat Pro to convert all of the objects in the file to SOLID Black.   It appears this was easy back in the day of version 8, when you could just select that option, but Acrobat Pro XI expects me to be a genius to figure out how to do this. 

The convert colors dialog is a mystery... I have been trying to figure out how to apply it for over an hour with no luck.

Any help on making those EXTREMELY hard to see light yellow lines in PDFs that were created long ago from Autodesk output in the most useless colors solid black would be great.  I can figure out had to get it to go to grey scale, but the light yellow ones, then still are INVISABLE to this struggling old person.

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1 reply

Stephen Marsh
Community Expert
Stephen MarshCommunity Expert
Community Expert
May 13, 2017

One method would be to use the print production tools, preflight, single fixup as follows:

This example converts 100% cyan elements to separation black, which is essentially the K plate of CMYK (but not in the CMYK colour model), it is not a spot colour despite using the spot colour conversion fixup (using the name Black changes the output). Note, this would not work for smooth shades (gradients) or raster images, but it does work for fills, strokes and text.

Of course, this is easy work for Enfocus PitStop Pro (fills, strokes, text, gradients, images can all be mapped or converted to other colours with ease).

Further explanations include:

Prepression: Acrobat Pro – Preflight Fixup to Convert Black Tint to Solid Black

Prepression: Acrobat Pro – Preflight Fixup to Convert Rich Black to CMYK Black

Prepression: Acrobat Pro – Converting CMYK Black PDF Content to CMYK Black

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