Digital BW, The Print

----- 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 :-)
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 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.

Ernst


> ----- 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