[argyllcms] Re: CMYK Profile Problem
- From: Idea Digital Imaging <qcore@xxxxxxxxxxxxxxxx>
- To: argyllcms@xxxxxxxxxxxxx
- Date: Fri, 12 Mar 2010 14:40:58 +0000
On 12 Mar 2010, at 03:32, Graeme Gill wrote:
-kh:
30.000000 0.000000 0.000000 [Lab] -> Lut -> 73.932829 66.670260
62.458836 48.582752 [CMYK]
73.932829 66.670260 62.458836 48.582752 [CMYK] -> Lut -> 29.446451
0.360905 -0.124091 [Lab]
When I said "shadows" I meant near blacks and black Graeme -- and I
don't understand why I get a rich black of:
0.000000 0.000000 0.000000 [Lab] -> Lut -> 56.619897 66.694278
71.962636 99.999998 [CMYK]
Working with an ink limit of 300%, depending on how I set the black
curve I get non-neutral CMY values appearing below L10.
On any single image this might not be a problem. But with product
images that sit on black backgrounds then this black is a PITA to deal
with repro-wise. It also looks wrong in Photoshop because of the huge
discrepancy between the relative and perceptual blacks.
Using Profilemaker to generate a "MaxK" curve on the same data I get
blacks like i'd expect them (although it puts too much yellow in the
light neutrals).
Is there any way of neutralizing the black or controlling the CMY
curves in the shadow areas?
Regards
--
Martin Orpen [using qcore retouching station]
T: 020 7739 5554 • M: 07768 414558
Idea Digital Imaging Ltd, 5 Christina Street, London EC2A 4PA
Registered in England & Wales: 4051407 VAT Registration: 548100073
Other related posts:
