QTR-Quadtone RIP

Yes that better explains what you have. I had misunderstood your original post. 

Still I think that if you publish your technique it will add to the knowledge of others!

Thanks,

Jon

--- In QuadtoneRIP@yahoogroups.com, Michael King <drmrking@...> wrote:
>
> Hi Jon,
> 
> >>Aaron is looking for a way to make K7 curves from the ground up. Aaron
> wants to learn how to make K7 curves using QTR tools or some other method.
> In other words, where nothing previously existed, he wants to have a curve
> or profile that can handle the K7 inks
> 
> So there is plenty of info for Aaron on how to use QTR for K6/7 from the
> ground up in the archives of this forum. But personally I would just take
> your profile K7 .quad for his printer and use my linearisation rather than
> bothering to go through the whole ink limits process. Essentially the same
> as I believe you would do with your linearizer.
> 
> What I have a is a tool that can linearise a b&w .quad file.
> That .quad file can come from any source. It can be an existing K6/7 .quad
> or a QTR generated .quad file, or a hand crafted .quad file.
> 
> QTR and your linearizer create perfectly good .quad files. But what is
> missing for the end user is the ability to easily relinearize an existing
> .quad themselves, for many reasons  - because no K7 or QTR profile is going
> to be truly linear on a printer other than the one it was created on, also
> when their paper/ink batch has changed, their printer has changed (sharing
> profiles) or aged, their environmental conditions have changed (summer /
> winter) or they are using a similar but different paper - all
> these perturb the linearisation.
> 
> Hope that better explains what I have.
> 
> Mike
> 
> 
> 
> 
> On 10 December 2010 20:02, piezobw <jon@...> wrote:
> 
> >
> >
> > Mike,
> >
> > Aaron is looking for a way to make K7 curves from the ground up. Aaron
> > wants to learn how to make K7 curves using QTR tools or some other method.
> > In other words, where nothing previously existed, he wants to have a curve
> > or profile that can handle the K7 inks.
> >
> > You wrote in your first response that you can profile K7. Did you mean to
> > say that, or did you mean to say that you can only linearize a pre-existing
> > set of curves or a pre-existing .quad file that someone else has made?
> >
> > I'm a little confused by your two responses.
> >
> >
> > Regards,
> >
> > Jon
> >
> > --- In QuadtoneRIP@yahoogroups.com <QuadtoneRIP%40yahoogroups.com>,
> > Michael King <drmrking@> wrote:
> > >
> > > Jon,
> > >
> > > Ok I will do, but it will be a few weeks as I am snowed under right now.
> > > Probably have time during the holidays.
> > >
> > > But just to be clear to everyone, the standard QTR methodology for
> > profiling
> > > /linearizing is fine for doing what it does and there is plenty of
> > > information on this forum how to do that. What it can't do (as far as I
> > can
> > > tell) is relinearize a set of curves that have already been linearized.
> > And
> > > it can't handle K7 curves or any other curves other than data created
> > > through QTR.
> > >
> > > Also QTR can only generate what I think of as limited overlapped curves.
> > > I've had problems with posterization that disappeared with greater
> > > overlapped curves more like Jon's K7.
> > >
> > > What I can do is take a QTR quad file and a printed target and linearize
> > > that quad file with the target data.
> > > Of course there are some caveats as with QTR and Jon's profiling, such as
> > > there mustn't be any reversals in the data set.
> > >
> > > Anyway more in a few weeks.
> > >
> > > Mike
> > >
> > > On 8 December 2010 20:50, piezobw <jon@> wrote:
> > >
> > > >
> > > >
> > > > Mike,
> > > >
> > > > Thanks for your concern - but please disclose your method. Our
> > profiling is
> > > > a service rather than a business model. There are many people who
> > simply
> > > > like to do it on their own. You have some process that anyone can port
> > to a
> > > > spread sheet. Sounds great!
> > > >
> > > > I find a lot of people who are wanting to make negative curves (for
> > > > example) are looking for a from-the-ground-up process to follow. They
> > want
> > > > to know how to start from scratch and use the QTR tools to build a set
> > of 6
> > > > or 7 curves.
> > > >
> > > > Unfortunately my profiler can not make curves which are editable in
> > QTR.
> > > >
> > > > Regards,
> > > >
> > > > Jon
> > > >
> > > >
> > > > --- In QuadtoneRIP@yahoogroups.com <QuadtoneRIP%40yahoogroups.com><QuadtoneRIP%
> > 40yahoogroups.com>,
> >
> > > > Michael King <drmrking@> wrote:
> > > > >
> > > > > So profiling / linearizing K7 or any QTR curve set, is actually very
> > > > > simple. I scratched my head for 12 months, tried doing it manually
> > etc.
> > > > and
> > > > > then one day the light bulb went off and a quick (slightly complex)
> > excel
> > > > > spreadsheet and I was sorted. Been using it for a couple years now
> > for
> > > > > myself and friends on 4800/7880 and 1900s. Perfect linearization
> > first
> > > > > time, every time. Of course you need a spectro.
> > > > >
> > > > > The advantage to doing it yourself is that printers change over time,
> > > > each
> > > > > paper batch is different, each ink batch is different, so its useful
> > to
> > > > be
> > > > > able to relinearize at low cost anytime.
> > > > >
> > > > > I've been reluctant to disclose the method because I don't want to
> > > > undermine
> > > > > Jon's profiling business,
> > > > > as from what I have seen its every bit as good as what Jon does, just
> > > > > requires you to have your own spectro.
> > > > >
> > > > > Mike
> > > > >
> > > > >
> > > > >
> > > > >
> > > > > On 8 December 2010 16:16, jespes <jesse@> wrote:
> > > > >
> > > > > >
> > > > > >
> > > > > >
> > > > > > One person's experience:
> > > > > >
> > > > > > I successfully made a K6 profile using QTR for an old Epson 7000.
> > This
> > > > on a
> > > > > > Mac. I followed the basic instructions, taught myself, and achieved
> > > > > > "success," with caveats.
> > > > > >
> > > > > > The caveats: It took much manual tweaking/guesstimating of the
> > numbers
> > > > > > within the profile file itself to get it close to "linearized." And
> > > > because
> > > > > > I found I had to finely tweak/guesstimate manually this way,
> > several
> > > > times I
> > > > > > made a total mess of it and had to start from scratch. Very time
> > > > consuming.
> > > > > > Many, many, many patterns printed.
> > > > > >
> > > > > > I'd pay someone to do it in an instant. The only reason I did it
> > myself
> > > > was
> > > > > > because the Piezography team said they no longer had the necessary
> > > > files to
> > > > > > profile an old 7000.
> > > > > >
> > > > > > After all my exertions, the profile is functional but not perfect.
> > So a
> > > > > > slight Photoshop curve must also be applied to the image.
> > > > > >
> > > > > > This laborious process gets me a low-cost, large-format printer.
> > I'll
> > > > never
> > > > > > again do it myself, however!
> > > > > >
> > > > > > Jp
> > > > > >
> > > > > >
> > > > > > --- In QuadtoneRIP@yahoogroups.com <QuadtoneRIP%40yahoogroups.com><QuadtoneRIP%
> > 40yahoogroups.com><QuadtoneRIP%
> >
> > > > 40yahoogroups.com>,
> > > >
> > > > > > "piezobw" <jon@> wrote:
> > > > > > >
> > > > > > > Aaron,
> > > > > > >
> > > > > > > It may be too complex for there to be a guide on it. Those who
> > have
> > > > > > attempted are not able to make profiles to the quality of the
> > > > Piezography
> > > > > > Profiler.
> > > > > > >
> > > > > > > Having said that, the process is similar to the making of three
> > > > blacks,
> > > > > > but involves seven blacks. You follow the same structure of
> > determining
> > > > > > maximum usefulink density on each channel and going from there.
> > > > > > >
> > > > > > > We use our own software which then compiles the results as a QTR
> > > > > > compatible set of numbers.
> > > > > > >
> > > > > > > We do offer customs on the inkjetmall website here:
> > > > > > >
> > > > > > >
> > > > > >
> > > >
> > http://shopping.netsuite.com/s.nl/c.362672/it.A/id.3682/.f?sc=15&category=-115#
> > > > > > >
> > > > > > > You use our Master Curve, print the 256 patch target, and mail it
> > to
> > > > us.
> > > > > > We measure it - email you back the QTR curve. It is $99 each.
> > > > > > >
> > > > > > > regards,
> > > > > > >
> > > > > > > Jon Cone
> > > > > > > Piezography
> > > > > > > InkjetMall
> > > > > > >
> > > > > > >
> > > > > > >
> > > > > > > --- In QuadtoneRIP@yahoogroups.com<QuadtoneRIP%40yahoogroups.com><QuadtoneRIP%
> > 40yahoogroups.com><QuadtoneRIP%
> >
> > > > 40yahoogroups.com>,
> > > >
> > > > > > "hongwanglinux" <chanhongwang@> wrote:
> > > > > > > >
> > > > > > > > I've been searching for a while but only found some docs which
> > is
> > > > about
> > > > > > how to profile the K3 inkset but not the K7 inks.
> > > > > > > >
> > > > > > > > Is there any instruction documentation which is about the "how
> > to
> > > > > > profile K7"?
> > > > > > > >
> > > > > > > > Thanks
> > > > > > > > Aaron
> > > > > > > >
> > > > > > >
> > > > > >
> > > > > >
> > > > > >
> > > > >
> > > > >
> > > > > [Non-text portions of this message have been removed]
> > > > >
> > > >
> > > >
> > > >
> > >
> > >
> > > [Non-text portions of this message have been removed]
> > >
> >
> >  
> >
> 
> 
> [Non-text portions of this message have been removed]
>