Inspiring

Answered

Blending: Difference in CMYK

Forum|Forum|7 years ago
September 5, 2018
4 replies
4049 views

Hi guys,

When I use blending mode difference in a CMYK document, the text on black background isn't showing as white. When I convert my doc to RGB, it appears correctly as I attend. How do I make so that the text appears white on black BG. Is it about rich black, etc? Pls see reference below:

CMYK not displaying the white text as white over black BG.

RGB text appears as intended.

I'm using Adobe CC

This topic has been closed for replies.

Correct answer Ton Frederiks

Blending modes can behave differently in RGB and CMYK documents.

I would convert the text to outlines and make a Compound Path with the black background.

Ton Frederiks

Community Expert

If you don't mind that your "Black" text will separate into CMY colors, you can use Difference mode.

But I would Create Outlines and use Compound Paths instead.

W

wuts23143389Author

Inspiring

Thank you all.

I've successfully used compound path as Ton originally suggested.

Ton Frederiks

Community Expert

Good to hear that helped.

Ton Frederiks

Correct answer

Community Expert

Blending modes can behave differently in RGB and CMYK documents.

I would convert the text to outlines and make a Compound Path with the black background.

c.pfaffenbichler

Community Expert

Blending modes can behave differently in RGB and CMYK documents.

The statement is not false but one could argue a technicality:

The Channel for Channel operations are not really different (for many Blending Modes), but as in one case black is 0/0/0 and in the other case it might be something like 87/78/64/93 the results can look very different. (edited)

And while using a 100/100/100/100 black might seem to produce results that appear similar to RGB it would not be a sensible work-around as it is technically inadmissible and could cause various problems.

c.pfaffenbichler

Community Expert

Is the text the same color as the black background but set to Blend Mode Difference?

If so you should look into what the difference between RGB and CMYK actually means.

No conventional CMYK space features true black as that would usually violate the admissible total area coverage for example.

c.pfaffenbichler

Community Expert

Is it about rich black, etc?

What »etc«?

When one want to use white text on a rich black CMYK background one may want to trap it by spreading the text in cyan, magenta and yellow.

What Blend Mode and Color does the text actually have?

Please post meaningful screenshots including the pertinent Panels (expanded Layers, Appearance, Attributes, Transparency, …).

W

wuts23143389Author

Inspiring

Hi,

The text is in White, background is Black & White (black value is 75/68/67/90, but behaves the same even if I change to 100/100/100/100). Blend mode is Difference. I tried convert the text to Outline -- same result.

Doug A Roberts

Community Expert

i get the same result with your black values, but white text if I use 100/100/100/100

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