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1 20th March 23:40
puddingbag29
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Posts: 1
Default converting to greyscale from cmyk error


Hi, not sure if this is a error but it seems to be i have tested this on several different mac computers with different versions of photoshop so im not sure.

I am designing a colour advert which i am going to convert to greyscale as its for a newspaper advert. In cmyk all of the black text text is 100% black and the photos are colour. When i convert the file to greyscale and test it using the eyedrop, it it show that the black in made out of cmyk and not just black which i thought it should be as its greyscale

I then put the file in indesign and had a look at the file in seperation and it showed that the black was 91% of black. so i dont know how to correct this as if you state you want 100% black surly thats what you should get??????????????

hope you can help as i can not think of a soluction

thanks

Tim
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2 20th March 23:40
cybernetic nomad
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Default converting to greyscale from cmyk error


"test using the eydropper"

And what is you info window set to? Make sure it is to "Actual Colour"

<http://www.pixentral.com/show.php?picture=1KekYaRyHe5ePCKtdrmLRFIM7lM0az>

As for InDesign, the same also applies. teh 91% reading you get is because 0/0/0/100% in CMYK is not the darkest colour you can get. Again, make sure your colour settings are OK

BTW, you may want to read up on colour management
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3 21st March 03:53
puddingbag29
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Default converting to greyscale from cmyk error


thank you for your reply

I think the biggest question is i have a geyscale image and it is set to actual color
but in the colour picker it show:

72 m 66
y 65
k 74

when its a greyscale image, is this normal?????????

Tim
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4 21st March 08:44
cybernetic nomad
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Default converting to greyscale from cmyk error


Then the image is not in greyscale mode

The numbers you describe are for a rich black. It is normal if the file is in CMYK mode. If you want your image on the black plate only, convert it to greyscale.
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