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Changing cmyk or rgb blacks to true blacks.

Forum|Forum|7 years ago
April 24, 2018
5 replies
8311 views

We pull pdf pages into indesign create a pdf and use File Minizer to create nice quality and the size is great.

We were using Pittstop on a mac to change the blacks in the pdfs to true black and true grey instead of Blacks and greys in CMYK or RGB.

In the past, the Pit
Stop process was doing this and it saved on the more expensive colored ink on
the machines by using the black ink for black print, instead of using the RGB
or CMYK to create black on the printer. Do you know if there is a way to do that
in Indesign or some other program?

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Correct answer Dave Creamer of IDEAS

This is from a previous post on using Excel charts and converting RGB black:

>Open PDF in Acrobat Pro and Convert Colors (under Print Production).

>Set appropriate color conversion profile and check the Preserve Black and the Promote Gray to CMYK Black settings.

Keep in mind that if you convert to CMYK upon export from InDesign, the RGB black is converted too. Export PDF without converting colors.

That said, PitStop Pro is more powerful. I just got an email yesterday advertising the release of PitStop Pro 2018.

Enfocus

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if doing a web search note only one T in pitstop.

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timothyh70102503Author

Known Participant

Thanks I still found it, Enfocus

Colin Flashman

Community Expert

I have some free scripts on my scripts page of www.colecandoo.com that can change colours within indesign. In illustrator, there is a new ability to control colours via the edit menu.

If the answer wasn't in my post, perhaps it might be on my blog at colecandoo!

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Check with Enfocus.

Dave Creamer of IDEAS

Correct answer

Community Expert

This is from a previous post on using Excel charts and converting RGB black:

>Open PDF in Acrobat Pro and Convert Colors (under Print Production).

>Set appropriate color conversion profile and check the Preserve Black and the Promote Gray to CMYK Black settings.

Keep in mind that if you convert to CMYK upon export from InDesign, the RGB black is converted too. Export PDF without converting colors.

That said, PitStop Pro is more powerful. I just got an email yesterday advertising the release of PitStop Pro 2018.

Enfocus

David Creamer: Community Expert (ACI and ACE 1995-2023)

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timothyh70102503Author

Known Participant

Question is Pittstop now a subscription service you renew each year or a one time purchase?

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Yes.

Bevi Chagnon - PubCom.com

Legend

In other thread, Dov Issacs (Adobe) gave these instructions on how to convert RGB to K blacks in Acrobat DC Pro:

Quoted from Re: Technicians claim my file doesn't have fonts embedded…but they're incorrect, right?

Acrobat Pro DC provides a preflight fixup explicitly for this. In Acrobat Preflight, access the Essentials library, select Single Fixups, and choose the Convert color to B/W fixup under the Color spaces, spot colors, inks group. Run that fix and this color issue is gone.

|    Bevi Chagnon   |  Designer, Trainer, & Technologist for Accessible Documents ||    PubCom |    Classes & Books for Accessible InDesign, PDFs & MS Office |

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PitStop is still available.