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Re: [Digital BW] Re: Neutral Curve for QTR

2004-12-06 by Carl Schofield

So why can't you blend profiles on XP?  You don't need the complier to 
make a neutral print using the stock cool and warm profiles.

On Dec 6, 2004, at 4:46 PM, johnglodge wrote:

>
>
> 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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