Digital BW, The Print

----- Original Message -----
From: "Ernst Dinkla" <e.dinkla@...>
To: <DigitalBlackandWhiteThePrint@yahoogroups.com>
Sent: Monday, August 12, 2002 8:34 PM
Subject: Re: [Digital BW] Small Gamut (was Density Meas .... etc.)


>
> ----- Original Message -----
> From: "Martin Wesley" <mwesley250@...>
> To: <DigitalBlackandWhiteThePrint@yahoogroups.com>
> Sent: Monday, August 12, 2002 7:49 PM
> Subject: Re: [Digital BW] Small Gamut (was Density Meas .... etc.)
>
> Martin, you wrote:
>
>
> > I would love to see MIS or ConeTech come out with an ink set similar to
> the
> > Lysonic E but done with pigment inks. The problem in mixing them up
> yourself
> > is keeping the proper overall density. Even in blending similar inks
like
> > MIS-FS Standard and Neutral some density shifts were obvious. I assume
> that
> > the companies have a great deal of expertise in this but I would not
want
> to
> > try it myself even with a spectrophotometer.
>
> There must be a quad set that has the tonal values of a CMYK inkset. No
gain
> at the shadows or highlights. A set like that will be suitable for mixing
> with CMYK inks. I'm probably too naive :-)

I see what you are saying but I don't think any of the companies have taken
that approach with the pigmented grayscale ink. I don't know why.

> Even with an extended tone scale it must be possible to get all in line
with
> the RIP that I have, linearising the CMYK stepwedges with a Spectrometer
> although they are all more or less grey then.

You should be able to do it. I have to wonder though why no one has done it
already?
>
> > You would have to do many trials mixing up an ink, loading it into a K
> > cartridge, printing a mono-ink wedge, take readings, compare them to the
> > visual density you want for the particular ink position you are mixing
up,
> > adjust your formula and do it all over again until you got it right. I
can
> > be done but a lot of work from scratch.
>
> Not something I'm eager to do, that's correct. So I hope it isn't
necessary.
> There's a spectrometer here, I will equip the 3000 with a CIS then. Bought
> cuvettes with this in mind, already checked a suitable lightsource for
> measuring with the spectrometer through the cuvettes. But I still hope it
> isn't necessary.

I think that you will need a reflective spectrophotometer to check the dried
in ink on paper rather than measuring the ink itself in a cuvette. I hope
you have success and will share your results.

Martin
>
>
> > ----- Original Message -----
> > From: "Ernst Dinkla" <e.dinkla@...>
> > To: <DigitalBlackandWhiteThePrint@yahoogroups.com>
> > Sent: Sunday, August 11, 2002 10:25 PM
> > Subject: [Digital BW] Small Gamut (was Density Meas .... etc.)
> >
> >
> > >
> > > ----- Original Message -----
> > > From: "Jerry Olson" <jerryolson@...>
> > > To: <DigitalBlackandWhiteThePrint@yahoogroups.com>
> > > Sent: Monday, August 12, 2002 6:23 PM
> > > Subject: Re: [Digital BW] Density Measurements on 2200 Wedges
> > >
> > >
> > > > Robert, they appear to have greatly improved the metamerism with the
> SG
> > > > inkset. If you print to a nice neutral in daylight, the prints look
> just
> > > > a tad sepia in tungsten, but not much. It's a great improvement from
> the
> > > > magenta metamerism they used to have.
> > >
> > > Is a SG inkset more complex than mixing a 4 tone quad inkset with a
CMYK
> > > inkset of the same manufacturer ?
> > > The most simple mix would be 50% Y to 50 % (yellow)grey, etc. A MIS
mix
> of
> > > pigment inks must be the easiest.
> > > Spectratone with Wide Spectrum for a dye version. As I understand it
> > > American Ink was the only other manufacturer of a SG inkset and they
> never
> > > launched it. Could be a patent issue (Joseph Holmes) of course.
> > >
> > > Ernst
>
>
>
>
>
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