Datacolor User to User Support Group.

In a message dated 3/5/06 8:45:54 PM, rlphoto@... writes:


> I appriciate the offer to make me a profile. It would be worth buying
> print fix pro though, just to have C.D. around to answer my questions :)
> 
> In the 8+ years I have been running epsons, I have yet to meet a more
> knoledgeable person in the field of digital imaging.
> 
Thats a nice break, after the warzone mentality on the DPRreview forum....
> 
> Is canvas any harder to profile?
> 

Yes, in that the texture creates highlight that sap color, shadows that sap 
color, and the relation between the two determines whether the result appears 
lighter than it should (gloss canvas with lots of highlight sheen) or darker 
(matte, with no highlight but plenty of shadow). You may have to increase the 
saturation slider to some degree, and may have to move the brightness slider a 
hair one way of the other to correct for the higlight/shadow balance. Other 
minor adjustments may be appropriate as well, on a canvas by canvas basis. But if 
you are used to optimizing for textured papers, this will not be much more of 
a challenge. There are other issues that have to do with there being a lot of 
lousy canvasses on the market, so if one doesn't work for you, try another. 
Never invest the price of a used car in a roll of wideformat canvas without 
printing in samples of it first.
> 
> And C.D., why would adobe rgb be better? The Hair looks great on my
> monitor till I soft proof.
> 
Workingspace shows you whats in the file. Softproof shows you (approximately) 
how the stuff in the file maps to the stuff that the printer can do. If your 
starting point is a bit closer to the printer gamut (or at least a bit larger 
than sRGB) then the relation between the two is a bit more effective.


>  The color must be already there in the
> first place?
> 
One could make the case that colors that are in-gamut for sRGB are actually 
better off there, as its a smaller space, and thus the 256 levels of each 
channel are smaller increments. Certainly against a huge space, I would agree with 
that. But a reasonable intermediate space like AdobeRGB does not tend to 
introduce gaps or banding. It does, however, offer a better starting point for 
images. This is for a number of reasons, some of them rather unsatisfying ones. 
For instance, many cameras offer AdobeRGB as their better processing space, and 
sRGB as an inferior result for the web. So try   capturing to AdobeRGB, and 
see if it helps. And look for new canvasses to hit the market, that make canvas 
more like an art paper, and less like a glossy photo paper with acne.

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