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| Black in CMYK output, 100% K or? http://www.x404.co.uk/forum/viewtopic.php?f=4&t=11662 |
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| Author: | isofa [ Tue Nov 30, 2010 3:47 pm ] |
| Post subject: | Black in CMYK output, 100% K or? |
A book I'm working on (heavy with photographs) which will be output in CMYK, has a lot of black backgrounds, should I use just a standard defined black (K=100, C,M+Y=0), or will that be a bit grey on a final print run - would it better to define a solid black colour with a set amount of Cyan for any large chunks of black backgrounds? TIA! |
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| Author: | tombolt [ Tue Nov 30, 2010 5:37 pm ] |
| Post subject: | Black in CMYK output, 100% K or? |
100% k is usually fine, but for a nice deep black, I usually run a 40% cyan shiner, so 100% k and 40% c. Watch out if the black touches the black background of the photos though, as this will be an even richer black and you'll see a line where the photo ends. Hope that makes sense! |
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| Author: | isofa [ Tue Nov 30, 2010 7:02 pm ] |
| Post subject: | Re: Black in CMYK output, 100% K or? |
Thanks Tom will give it a go, all the images have a white keyline, so hopefully will be ok! |
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| Author: | paulzolo [ Tue Nov 30, 2010 8:41 pm ] | |||||||||
| Post subject: | Re: Black in CMYK output, 100% K or? | |||||||||
You'll have to hope the printer can line the plates up properly then. That's the only problem with printing black made up of a number of colours. Is there a rich Pantone black you cold use instead? Ask your printer for guidance on this. |
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| Author: | tombolt [ Tue Nov 30, 2010 11:49 pm ] |
| Post subject: | Black in CMYK output, 100% K or? |
If the printer is using computer to plate (which any decent printer will be) registration shouldn't be a problem, but paul's right, it's always worth asking them for guidance. |
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| Author: | isofa [ Wed Dec 01, 2010 9:15 am ] |
| Post subject: | Re: Black in CMYK output, 100% K or? |
It's definitely CTP, direct from the press-ready PDF with their PDF settings I'll create, but will check anyway. Thanks 
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| Author: | isofa [ Fri Dec 03, 2010 8:51 am ] |
| Post subject: | Re: Black in CMYK output, 100% K or? |
Checked and am using a rich black composed of 60C, 50M, 50Y and 100K. Fingers crossed... |
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| Author: | steve74 [ Fri Dec 03, 2010 11:27 am ] | |||||||||
| Post subject: | Re: Black in CMYK output, 100% K or? | |||||||||
Hmm, that's quite a dense ink coverage, I'd be crossing more than just my fingers!  I'd definitely insist on seeing a proof first, or a visit to the printers for a print pass. You may have to weight up that keyline slightly to compensate for any registration problems or ink spread. For example, a 1pt white keyline might end up looking like a 0.5pt keyline (or less) if the ink spreads a little into it. It's always worth asking your printers and see if they can suggest alternative process splits - or maybe a spot-UV will give you that richness in the blacks? |
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