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Mottled Pattern in 21 Step

Mottled Pattern in 21 Step

2005-12-23 by Tom Husband

I'm making a curve for Entrada Fine Art Natural for UT7 ink on a 2200.
 When I print the calibration mode pattern page I get this mottled
look from the mid tones up to 100.  K is OK but all the lighter shades
have this almost camouflage pattern of light and dark spots.  Any idea
what would cause this?  I'm on a PC and nozzle checks are fine.

Thanks,

Tom

RE: [QuadtoneRIP] Mottled Pattern in 21 Step

2005-12-23 by Paul D. DeRocco

> From: Tom Husband
>
> I'm making a curve for Entrada Fine Art Natural for UT7 ink on a 2200.
>  When I print the calibration mode pattern page I get this mottled
> look from the mid tones up to 100.  K is OK but all the lighter shades
> have this almost camouflage pattern of light and dark spots.  Any idea
> what would cause this?  I'm on a PC and nozzle checks are fine.

I've seen mottling when the ink load was too high. Are you pushing the light
inks too far? You might try tweaking the parameters to substitute more of
the next darker ink.

--

Ciao,               Paul D. DeRocco
Paul                mailto:pderocco@...

Re: [QuadtoneRIP] Mottled Pattern in 21 Step

2005-12-23 by Tom Husband

Thanks Paul.  I'm seeing this on the Ink Pattern Page where you 
characterize the ink paper combination and there's really no ink load 
adjustment.  You start at 100 mode and determine when the ink maxes 
out.  The mottling was there even after I printed the second page at 
75.  It starts around 40 and runs all the way to 100.  I wonder if it's 
the ink paper combination?  I didn't see it with Kayenta.

Tom

Paul D. DeRocco wrote:
Show quoted textHide quoted text
> > From: Tom Husband
> >
> > I'm making a curve for Entrada Fine Art Natural for UT7 ink on a 2200.
> >  When I print the calibration mode pattern page I get this mottled
> > look from the mid tones up to 100.  K is OK but all the lighter shades
> > have this almost camouflage pattern of light and dark spots.  Any idea
> > what would cause this?  I'm on a PC and nozzle checks are fine.
>
> I've seen mottling when the ink load was too high. Are you pushing the 
> light
> inks too far? You might try tweaking the parameters to substitute more of
> the next darker ink.
>
> --
>
> Ciao,               Paul D. DeRocco
> Paul                mailto:pderocco@...
>
>
>
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RE: [QuadtoneRIP] Mottled Pattern in 21 Step

2005-12-23 by Paul D. DeRocco

> From: Tom Husband
>
> Thanks Paul.  I'm seeing this on the Ink Pattern Page where you
> characterize the ink paper combination and there's really no ink load
> adjustment.  You start at 100 mode and determine when the ink maxes
> out.  The mottling was there even after I printed the second page at
> 75.  It starts around 40 and runs all the way to 100.  I wonder if it's
> the ink paper combination?  I didn't see it with Kayenta.

Does the ink get much darker than the point where it begins to mottle? If it
does, then I doubt it's too much ink. But that's the only situation in which
I've seen anything I'd call mottling. And even then, it was at the dark end
of the scale, and very subtle. Also, I saw it on an RC paper (Epson
Semigloss, I think). I don't know the Entrada paper, but if that's a matte
paper, then I doubt it's an ink load issue, either.

--

Ciao,               Paul D. DeRocco
Paul                mailto:pderocco@...

Re: Mottled Pattern in 21 Step

2005-12-24 by joshhackney

Tom,

Have you tried a nozzle alignment?  I was suprised on my 2200 how far it was out of 
alignment straight out of the box.  Just a guess.

Good luck.

Josh


--- In QuadtoneRIP@yahoogroups.com, "Paul D. DeRocco" <pderocco@i...> wrote:
Show quoted textHide quoted text
>
> > From: Tom Husband
> >
> > Thanks Paul.  I'm seeing this on the Ink Pattern Page where you
> > characterize the ink paper combination and there's really no ink load
> > adjustment.  You start at 100 mode and determine when the ink maxes
> > out.  The mottling was there even after I printed the second page at
> > 75.  It starts around 40 and runs all the way to 100.  I wonder if it's
> > the ink paper combination?  I didn't see it with Kayenta.
> 
> Does the ink get much darker than the point where it begins to mottle? If it
> does, then I doubt it's too much ink. But that's the only situation in which
> I've seen anything I'd call mottling. And even then, it was at the dark end
> of the scale, and very subtle. Also, I saw it on an RC paper (Epson
> Semigloss, I think). I don't know the Entrada paper, but if that's a matte
> paper, then I doubt it's an ink load issue, either.
> 
> --
> 
> Ciao,               Paul D. DeRocco
> Paul                mailto:pderocco@i...
>

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