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greyish gradient border around fading gradient edge in cmyk.


O

Oskars Lekuns

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Dear all,
i created illustration in photoshop in cmyk to be placed in illustrator on 100% black background.
To my big surprise, some kind of dirty, greyish gradient will become visible on illustration edges instead of nice and soft fading green. can we fight this? :)
 
Ok, I'll take a stab at this one.........(Tom will have to correct me if I'm wrong)

The problem is that CMYK black is not a true black and leans slightly to the grey side. Note the differences here.....

Black
CMYKvsRGB_01.png

CMYK Black
CMYKvsRGB_02.png

Try using a more rich black by adding Cyan or Magenta....

Rich Cool Black
Cyan – 40%
Yellow – 0%
Magenta – 0%
Black – 100%

Rich Warm Black
Cyan – 0%
Magenta – 40%
Yellow – 0%
Black – 100%
 
I think Sam is on the right track.

The way I would describe what I think you want is that you want to fade to black by going through darker greens, not from green (saturated) to gray (completely unsaturated).

HTH,

Tom
 
Last edited:
Put a new layer with the black dot on top of your green background. Change this layer to multiply. This should solve your problem, it worked with me.

Green and Black.jpg
 
I had all sorts of problems posting an attachment to my earlier post. I thought the attachment stuck, but I now see that it didn't and some of my text got eaten. Anyway, here's my attachment again.

You'll get a chuckle when you see it, Chris. :-)

2013-09-25_103628.jpg




T
 
Tom said:
I had all sorts of problems posting an attachment to my earlier post. I thought the attachment stuck, but I now see that it didn't and some of my text got eaten.
Click to expand...
It's good to know that I'm not the only one who is having problems!


Tom and Chris, what color mode is your "dot" before you change the layer mode to multiply?
 
IamSam said:
It's good to know that I'm not the only one who is having problems!


Tom and Chris, what color mode is your "dot" before you change the layer mode to multiply?
Click to expand...


I changed the green BG picture from RGB to CMYK before I made the "dot" layer. Then changed the layer to multiply, added a black dot, filled with K100% (black in CMYK mode), applied some gaussian blur.
 
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