>
>
> --- In DigitalBlackandWhiteThePrint@yahoogroups.com, "Paul Roark"
> <paul.roark@v...> wrote:
> > You'll notice that I generate black with the 2 dark grays. It
> generally is
> > better than at least the old PK. I think there are several reasons for
> > this. It allows the tone to be controlled, it has less gloss
> differential,
> > and perhaps 2 jets firing gets better coverage.
> >
> > One reason the MIS PK did not do well was that it dulled down too
> much. My
> > mixing indicates that the old MIS PK actually had more pigment in it
> than
> > the Epson PK. In fact, it probably had too much pigment. That may have
> > contributed to the dulling down problem and be the reason the dark
> grays did
> > better -- they have more base that does a better job of coating the
> carbon.
> > This is one area where the Epson PK acrylic-coated particles paid off
> > significantly.
> >
> > Some of us have tried the Epson PK in an otherwise MIS UT inkset.
> However,
> > what we've found is that the transition from the un-coated to coated
> > particles is visible and gives a rough look to the shadows.
> >
> > The new MIS PK appears to significantly address the dulling-down
> problem.
> > The new base, in effect, coats the particles much better. I have
> not had an
> > opportunity to test the new PK on various papers, but samples I have
> appear
> > to retain their gloss quite well.
> >
> > Paul
> > www.PaulRoark.com
> >
> >
> > > -----Original Message-----
> > > From: DigitalBlackandWhiteThePrint@yahoogroups.com
> > > [mailto:DigitalBlackandWhiteThePrint@yahoogroups.com] On Behalf Of
> > > Jonathan Traupman
> > > Sent: Thursday, September 08, 2005 11:27 PM
> > > To: DigitalBlackandWhiteThePrint@yahoogroups.com
> > > Subject: [Digital BW] Weak blacks with UT7 PK and PKN
> > >
> > > I've been doing B&W printing with a 2200 and the UT7 inks for about a
> > > year now and have been getting great results on matte papers with
> > > Eboni black. I drive the printer with Quadtone RIP and build most of
> > > my paper profiles myself with a Noritsu DM-201 densitometer.
> > >
> > > However, I've had very limited success with printing on glossy and
> > > semi-gloss media. The biggest problem I've encountered is that the MIS
> > > Photo Black ink is simply not very dense.
> > >
> > > For example, I'm trying to create a QTR profile for Epson Premium
> > > Semigloss paper. If I print the QTR ink limit file in calibration mode
> > > with all limits set to 100%, the density of the 100% Photo Black patch
> > > is only around 1.9. This is weaker than the densities of the Dark Warm
> > > Gray (2.1) and Dark Cool Gray (2.2) 100% patches. I've actually gotten
> > > better results from profiles that just use the gray inks than from
> > > ones that use PK and the grays, though neither looked particularly
> great.
> > >
> > > I recently ordered a bottle of the "experimental" PKN Photo Black
> > > Neutral ink since MIS claims it has a higher Dmax than regular PK.
> > > However, I neither noticed nor measured any appreciable increase in
> > > density, at least on the Premium Semigloss paper. It is a more neutral
> > > black, however.
> > >
> > > So, is this normal behavior for the MIS Photo Blacks? With the Epson
> > > UC Photo Black, I routinely got densities of 2.2+ with this paper. It
> > > just seems odd that MIS's Photo Blacks would be this weak, when their
> > > grays clearly indicate that they can make a denser ink.
> > >
> > > My search through the archives yielded little info on this topic, but
> > > it does seem that densities around 1.9 are what people have reported
> > > in the past for these inks. Is this true across papers, or is the
> > > Premium Semigloss just a particularly bad choice for the MIS inks?
> > >
> > > The only potential problem that I can imagine with my setup is that I
> > > have put the PK ink in a light black cartridge and am using it in that
> > > position, because QTR allows me to control which black to use in
> > > software, and I have no need for the "Custom Light Black" that usually
> > > goes there because I'm not using the Epson driver. Perhaps the light
> > > black position in the print had incapable of laying down as much ink
> > > as the black position, but I've never heard mention of this.
> > >
> > > I've already tried asking MIS about this, both on their forums and to
> > > their tech support, but received no response.
> > >
> > > Any help would appreciated.
> > >
> > > -Jon
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > >
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> Please follow these basic guidelines:
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> - Keep your posts and threads related to the group topic of digital B&W
> printing. Users who persistently make off-topic posts may be removed from
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> EXEMPLARY DAMAGES, INCLUDING BUT NOT LIMITED TO, DAMAGES FOR LOSS OF
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