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Digital BW, The Print

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Message

[Digital BW] Re: Neutral Curve for QTR

2004-12-06 by johnglodge

All that is fine but the original query did say XP; and for XP the
profiles are delivered canned: no access to the profile compiler!

...John

--- In DigitalBlackandWhiteThePrint@yahoogroups.com, Carl Schofield
<scho@m...> wrote:
> Neutrality is achieved with the UC inks by adjusting the proportions of 
> light black, light cyan, and light magenta inks used for the print.  
> This adjustment can be more precisely achieved for a user's particular 
> printer, inks, and paper by blending the warm/cool profiles than by 
> using a generic "neutral" profile made with a different printer, inks, 
> and paper.  Note also that current QTR profiles do not neutralize the 
> black ink (either matte K or Photo K, depending on which papers used) 
> so absolute neutrality is only obtained up through the midtones before 
> the black ink kicks in at around 75%.  In the deep shadows where K is 
> the predominant ink the tone will be slightly warmer because of the 
> inherent warmth of both the matte black and photo black inks.  This 
> tonal shift from neutral midtones (with the right blend of warm/cool 
> profiles) to warmer shadows will be most noticeable on RC papers 
> because of the extreme warm brown tone of the Epson Photo black ink.
> 
> 
> On Dec 6, 2004, at 2:46 PM, chipcarterdc wrote:
> 
> >
> >
> > FYI, I've asked this question before.  As I understand it, the
creator 
> > of QTR has
> > decided that blending of the various curves to achieve each user's 
> > view of
> > "neutrality" is the better method, rather than providing a "canned" 
> > neutral
> > curve.  (It's been a long time since I asked this question, so
forgive 
> > me if I'm
> > misremembering what Roy said in response).  That's a fair view, but I 
> > still think
> > that, as good as QTR is, it would be helpful to have a canned neutral 
> > curve.
> > I've dipped into QTR from time to time, and even paid the shareware 
> > fee, but
> > generally use ImagePrint for my 9600,  particularly since I need some 
> > of IP's
> > other features in addition to neutral grayscale.  On my 4000, I plan 
> > to use QTR
> > in the future for B&W -- for the moment, it's not an issue since I 
> > print my B&W
> > on the 9600 via ImagePrint.
> >
> > The other answer I got in response to this question (not from Roy,
but 
> > from
> > other group members) was along the lines of "you just have to 
> > linearize the
> > whatchamacallit and build your own neutral curve using a spectrograph
> > thingy."  (As you can tell, I don't recall exactly what the response 
> > was, but it
> > was over my head).  Since I don't know what "linearize" means and 
> > don't have
> > any measuring tools of my own and don't know how to build my own QTR
> > curves, this wasn't practical for me.
> >
> > Finally, I got various suggestions on how to combine curves to get a 
> > neutral
> > tone (25% of this, 75% of that).  I tried and still was not able to 
> > come up with a
> > curve I considered neutral gray.  (But I'm sure I'll delve into it 
> > again someday).
> > I do suggest that you  try various combinations to see if you can
come 
> > up with
> > a tone you consider neutral.
> >
> > Last point: for what you pay for QTR (very little) and how good of a 
> > job it does
> > generally, I think it's an outstanding piece of software.  But I
still 
> > wish it had a
> > canned neutral curve.
> >
> > --- In DigitalBlackandWhiteThePrint@yahoogroups.com, Richard 
> > Smallfield <
> > r.smallfield@p...> wrote:
> >> Hi, I've recently installed QTR for XP and notice that there is no 
> >> neutral
> > curve. I wondered what people had found the best mix of tones was to 
> > get a
> > perfectly neutral curve for EEM/HPR?
> >>
> >> I've just experimented with 25% cool Selenium and 75% Warm and with
> > small prints, and it looks pretty good. However, I've found that with 
> > 10x15"
> > prints any slight tonal bias becomes much more noticeable.
> >>
> >> Any thoughts would be appreciated.
> >>
> >> thanks,
> >> Richard
> >> --
> >> http://smallfield.vze.com
> >> http://photos.smallfield.vze.com
> >>
> >>    "The ultimate result of shielding men from the effects of folly,
> >>    is to fill the world with fools."
> >>    --Herbert Spencer
> >
> >
> >
> >
> >
> >
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> >
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