Digital BW, The Print

In a message dated 1/16/06 4:29:27 AM, odesmais@... writes:


> 
> Oppositely on Archival Matte with the proper driver settings the
> results are below expectations not to say puzzling. With CB not
> activated and a custom profile with no clb, the print is pretty good.
> With CB clb file activated and a custom profile made with clb
> activated the result is poor : on a portrait I often use for profile
> assessment, the skin is reddish and bluish.
> 

Just as a general issue: you need to run ColorBase on your printer, and have 
the CB calibration active, before building a custom profile in order for 
ColorBase to be valid with that profile. If you don't do it in this order then the 
profile would be expected to be less accurate with ColorBase than without it. 

This may or may not address your particular case...

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


[Non-text portions of this message have been removed]

Thanks David, this is the way I proceed. The soft is quite 
straightforward in how it should be run.

Right now, I feel better off with a profile straight out of the 
printer with no calibration... and I don't feel this should be the 
way. I trust Colorbase bringing the printer back to its factory 
linearisation is a plus I'd like to benefit from...as long as I can 
manage it.

Olivier

--- In DigitalBlackandWhiteThePrint@yahoogroups.com, CDTobie@a... 
wrote:
>
>> Just as a general issue: you need to run ColorBase on your 
printer, and have 
> the CB calibration active, before building a custom profile in 
order for 
> ColorBase to be valid with that profile. If you don't do it in this 
order then the 
> profile would be expected to be less accurate with ColorBase than 
without it. 

> 
> This may or may not address your particular case...
> 
> C. David Tobie
> Product Technology Manager
> ColorVision Business Unit
> Datacolor Inc.
> CDTobie@c...
> www.colorvision.com
> 
> 
> [Non-text portions of this message have been removed]
>

In a message dated 1/16/06 12:27:19 PM, odesmais@... writes:


> Thanks David, this is the way I proceed. The soft is quite
> straightforward in how it should be run.
> 
> Right now, I feel better off with a profile straight out of the
> printer with no calibration... and I don't feel this should be the
> way. I trust Colorbase bringing the printer back to its factory
> linearisation is a plus I'd like to benefit from...as long as I can
> manage it.
> 
ColorBase has little or no effect on a printer already well centered its 
range. So whether a given printer gets better results with it invoked would tend 
to vary from printer to printer. Any extra step has the potential to make 
results less, not more, accurate, if everything is not working just right. If you 
were getting odd results driving the spectro from ColorBase, I would assume 
that there was a problem there which is responsible for your odd results. 
 
C. David Tobie
Product Technology Manager
ColorVision Business Unit
Datacolor Inc.
CDTobie@...
www.colorvision.com


[Non-text portions of this message have been removed]

> ColorBase has little or no effect on a printer already well 
centered its 
> range. So whether a given printer gets better results with it 
invoked would tend 
> to vary from printer to printer. Any extra step has the potential 
to make 
> results less, not more, accurate, if everything is not working just 
right. If you 
> were getting odd results driving the spectro from ColorBase, I 
would assume 
> that there was a problem there which is responsible for your odd 
results. 


Well this is where it is weird. Initially I intended to leave it here 
and use CB only for USFA and no CB for EEM (and this may be what I 
will be ending with). Bu then I noticed that I got a smoother tone 
with CB activated : the tone is not the one but it is smoother. I 
know there are debates whether CB is useful on a single printer, but 
I suspect that if it runs a proper calibration (linearization is thus 
fine), which would explain the smoothness of the skin tone it is 
worth giving it additional experimentation. I can't figure out 
whether a given paper-ink combination implies a choice bewteen tone 
smoothness and color accuracy or if you can get both.

Olivier

Olivier,

Bookmark Atkinson's webpage (in my ealier post) and check it from 
time to time. Eventually he'll release matte profiles.

I don't this is of no help to you today, right now, but when he does 
release them, I'm sure you won't have to fool with ColorBase to get 
the results you're looking for.

Scott

--- In DigitalBlackandWhiteThePrint@yahoogroups.com, "Olivier" 
<odesmais@y...> wrote:
>
> > ColorBase has little or no effect on a printer already well 
> centered its 
> > range. So whether a given printer gets better results with it 
> invoked would tend 
> > to vary from printer to printer. Any extra step has the potential 
> to make 
> > results less, not more, accurate, if everything is not working 
just 
> right. If you 
> > were getting odd results driving the spectro from ColorBase, I 
> would assume 
> > that there was a problem there which is responsible for your odd 
> results. 
> 
> 
> Well this is where it is weird. Initially I intended to leave it 
here 
> and use CB only for USFA and no CB for EEM (and this may be what I 
> will be ending with). Bu then I noticed that I got a smoother tone 
> with CB activated : the tone is not the one but it is smoother. I 
> know there are debates whether CB is useful on a single printer, 
but 
> I suspect that if it runs a proper calibration (linearization is 
thus 

> fine), which would explain the smoothness of the skin tone it is 
> worth giving it additional experimentation. I can't figure out 
> whether a given paper-ink combination implies a choice bewteen tone 
> smoothness and color accuracy or if you can get both.
> 
> Olivier
>