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100% Black converting to CMYK

New Here ,
Mar 07, 2019

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Hi,

When converting and InDesign document to PDF, I have the problem that all black elements convert to cmyk black instead of staying 100% black.

Can anyone tell me why, and how I can prevent it.

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Correct answer by rob day | Adobe Community Professional

Export using  the PDF/X-4 preset and measure the [Black] CMYK value in AcrobatPro‘s Output Preview.

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100% Black converting to CMYK

New Here ,
Mar 07, 2019

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Hi,

When converting and InDesign document to PDF, I have the problem that all black elements convert to cmyk black instead of staying 100% black.

Can anyone tell me why, and how I can prevent it.

Adobe Community Professional
Correct answer by rob day | Adobe Community Professional

Export using  the PDF/X-4 preset and measure the [Black] CMYK value in AcrobatPro‘s Output Preview.

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552

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Mar 07, 2019 0
Adobe Community Professional ,
Mar 07, 2019

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[moved from Adobe Creative Cloud to InDesign]

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Mar 07, 2019 0
Adobe Community Professional ,
Mar 07, 2019

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Export using  the PDF/X-4 preset and measure the [Black] CMYK value in AcrobatPro‘s Output Preview.

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Mar 07, 2019 0
Adobe Community Professional ,
Mar 07, 2019

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Are you saying they are converting to a 4/C or multi-color CMYK black--for example: 60C, 40M, 40Y, 100K?

Or to a black-only CMYK black--0C, 0M, 0Y, 100K?

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Mar 07, 2019 0
New Here ,
Mar 07, 2019

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Hi, IDEAS-Training.

It would convert 0|0|0|100 to a 4 colour black.

Using the PDF/X-4 maintains the single colour, although it still indicated Overprint.

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Mar 07, 2019 0
Participant ,
Mar 07, 2019

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Be sure in Edit -> Transparency Blend Space you have "Document CMYK" choosen, not "Document RGB".

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Mar 07, 2019 0
Adobe Community Professional ,
Mar 07, 2019

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A feature of the default PDF/X-4 preset is CMYK black (0|0|0|100) will export unchanged even when the blend space is set to RGB.

PDF/X-1a, which flattens transparency, would convert black only to a 4-color mix if there’s any transparency on the spread or page.

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Mar 07, 2019 0
New Here ,
Mar 07, 2019

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Thank you Rob Day,

This worked. But, can you tell me - why does it still show the black as being overprint?

And, I don't have Acrobat Pro - is it included in CC?

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Mar 07, 2019 0
rob day LATEST
Adobe Community Professional ,
Mar 08, 2019

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Unless you change the Appearance of Black preference, the [Black] swatch always overprints.

You would never want small text on a colored background to knockout. For large areas of black make a new black or rich black swatch. new swatches knockout unless you check Overptint in the Attributes panel

AcrobatPro should be included in your subscription. Its Output Preview lets you check output values and object color modes.

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Mar 08, 2019 0