RGB to CMYK
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- GeorgesII
How can I be sure, my black is still black when I convert it to CMYK
its there a full proof test?
- WeLoveNoise0
are u converting it via photoshop ?
- either way colour is always a good way of making sure you have the right colours u want. best using that in illy thoWeLoveNoise
- sorry meant to say eyedropper tool
dohWeLoveNoise
- meemorize0
after converting use the eye dropper tool in photoshop and read the colour values in the 'info' panel.
- GeorgesII0
yes
the black goes greyish, normal I guess when converting to cmyk,
only that i'm not sure anymore that its full black
- monoboy0
Do a search for Rich Black or Super Black.
- ian0
geroges, check your ink break down in the eye dropper tool in illy. If you convert from RGB to CYMK it'll change it, probably to a funky setting of 25.67% on some of the colours. A rich black (as suggested my monoboy) is usually 100% black mixed with other colours, such as 50% cyan or 30% cyan & 30% magenta.
Depending on how fine the white lines in the design are you may just want to separate to two plates (black and cyan) to avoid fill-in.
- sabatizer0
Some related tips:
In photoshop when converting just look at each of the channels for CMYK, to be sure there are no surprises before going to press. Also I've been told if you convert RGB to LAB then to CMYK it converts your blues a bit more accurately. I haven't noticed too much of a difference.For more control in photoshop go to edit > color settings and in "working spaces" change CMYK setting to custom. You can set your ink limits there, so that your rich blacks can add up to 300% or 250% (or whatever your printer will allow, usually not over 300).
In illustrator if you have a lot of flat color, make any main colors (like black) a swatch in your palette, and assign that swatch to all black elements. Then when you convert RGB to CMYK, just check that the swatch converted to the black you want rather than checking every element.