Digital BW, The Print

In a message dated 11/29/06 1:26:02 PM, daniel@... writes:


> I rembember Entrada printed significantly cooler and greener than other
> papers with the UT7 inks. Does it still do that? I'm wondering if you would
> get different results with another paper.
> 
Results would certainly differ. But as I noted the new Entrada prints warm, 
not cool. The older version would actually do better at offering neutrals with 
UT7s.   MY impression of the overall gamut of these inks is that they range 
from chocolate to... less chocolate.
> 
> Could you set the driver to color controls, adjust the contrast to get
> better transitions in the shadows, and profile this? Would that give better
> results?
> 
This would not change the color of the inks, it would just reduce the overall 
color gamut even further. I would anticipate worse results.
> 
> I remember setting density to +20% actually reducing dmax on several papers,
> so I'd prefer to avoid that.
> 
Yes, both a +20 and a -20 ended up adding a couple of L* points at black; not 
good. One more reason for recommending the UT3Ds...
> 
> In any case, my PFP is arriving any day now, so I'll try all of these things
> and report back with my results. My comparison will be ICC's created with my
> X-Rite 810 and QTR-Create-ICC-RGB, which is working very well for me.
> 
CreateICC does not create legal ICC profiles. It creates RGB Channel-Curves 
sandwiched onto null ICC profile cores. PrintFIX PRO is creating actual 3D 
LookUpTable profiles. So its a very different process, and very different results.
> 
> The main reason I don't want to use the UT-3D inkset is that then I can't
> put GLOP in the yellow position. I still find Gloss Optimizer very useful on
> several glossy papers.
> 
> You can't put ANYTHING unexpected into the ink channels without then taking 
responsibility for all the channel controls with a RIP, and curves, and all of 
that. But not everyone is anxious to get under the hood, RIP (pardon the pun) 
out components, substitute others, and try to get the thing running again. If 
you want to use GLOP via the driver, you need a printer that comes with GLOP, 
so the driver knows its there. Or else use gloss inks (as Epson now does) 
instead of GLOP, or use sprays after printing... etc.

C. David Tobie
Product Technology Manager
ColorVision Business Unit
Datacolor Inc.
CDTobie@...
www.colorvision.com



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