QTR-Quadtone RIP

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>,
> "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>,
> "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
> > >
> >
>
>  
>


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