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Getting dMin down

Getting dMin down

2005-11-11 by Tom Husband

I'm creating some cool and warm curves for Moab Kayenta and a 2200
with UT7 ink.  I'm happy with the dMax of 1.600 but dMin is running
0.130.  Ideally shouldn't it be 0.000?  How would I get it there?  If
I were to increase the value of the Gray Curve Highlight would it
bring the dMin down?  Right now I have the highlight at 4.

Thanks,

Tom

RE: [QuadtoneRIP] Getting dMin down

2005-11-11 by Tom Moore

Dmin is established by the density of paper white. Unless you have some
white ink installed in your printer, that's as low as you can go. Of course
you could use a brighter paper.

Seriously, though your dmin value does seem unusually high. Looking at the
various curves in the distribution, most dmin values are in the range .02 to
.08. For example looking at the 4000 curve for Moab Entrada Natural the
first linearization step (effectively the dmin or density of paper white) is
.03 and the 10% gray step, at .015, is just slightly darker than your dmin. 

It could be that Kayenta is darker than most other papers, your density
measurements are off, or your curve is putting ink down at 0% gray. 

Tom Moore
Show quoted textHide quoted text
> -----Original Message-----
> From: QuadtoneRIP@yahoogroups.com [mailto:QuadtoneRIP@yahoogroups.com] On
> Behalf Of Tom Husband
> Sent: Thursday, November 10, 2005 11:41 PM
> To: QuadtoneRIP@yahoogroups.com
> Subject: [QuadtoneRIP] Getting dMin down
> 
> I'm creating some cool and warm curves for Moab Kayenta and a 2200
> with UT7 ink.  I'm happy with the dMax of 1.600 but dMin is running
> 0.130.  Ideally shouldn't it be 0.000?  How would I get it there?  If
> I were to increase the value of the Gray Curve Highlight would it
> bring the dMin down?  Right now I have the highlight at 4.
> 
> Thanks,
> 
> Tom
> 
> 
> 
> 
> 
> 
> 
> Yahoo! Groups Links
> 
> 
> 
> 
>

Re: Getting dMin down

2005-11-11 by Tom Husband

I think it must be my X-rite 810.  EAM when measured comes in at .13.
 I'll recalibrate this weekend but I just did it a month ago so I'm
surprised it's so far off.  Either I'm not calibrating correctly or
something is wrong with the unit.

Thanks,

Tom

--- In QuadtoneRIP@yahoogroups.com, "Tom Moore" <r.t.moore@r...> wrote:
>
> Dmin is established by the density of paper white. Unless you have some
> white ink installed in your printer, that's as low as you can go. Of
course
> you could use a brighter paper.
> 
> Seriously, though your dmin value does seem unusually high. Looking
at the
> various curves in the distribution, most dmin values are in the
range .02 to
> .08. For example looking at the 4000 curve for Moab Entrada Natural the
> first linearization step (effectively the dmin or density of paper
white) is
> .03 and the 10% gray step, at .015, is just slightly darker than
your dmin.
Show quoted textHide quoted text
> 
> It could be that Kayenta is darker than most other papers, your density
> measurements are off, or your curve is putting ink down at 0% gray. 
> 
> Tom Moore

Re: [QuadtoneRIP] Getting dMin down

2005-11-11 by Rainer Taube

Hallo,

i just took a measurement of  blank sheet of moab kayenta with an EyeOne 
and QuickRead and in my case it shows 0.04.

Regards

Rainer


Tom Moore wrote:
Show quoted textHide quoted text
> Dmin is established by the density of paper white. Unless you have some
> white ink installed in your printer, that's as low as you can go. Of 
> course
> you could use a brighter paper.
>
> Seriously, though your dmin value does seem unusually high. Looking at the
> various curves in the distribution, most dmin values are in the range 
> .02 to
> .08. For example looking at the 4000 curve for Moab Entrada Natural the
> first linearization step (effectively the dmin or density of paper 
> white) is
> .03 and the 10% gray step, at .015, is just slightly darker than your 
> dmin.
>
> It could be that Kayenta is darker than most other papers, your density
> measurements are off, or your curve is putting ink down at 0% gray.
>
> Tom Moore
>
> > -----Original Message-----
> > From: QuadtoneRIP@yahoogroups.com 
> [mailto:QuadtoneRIP@yahoogroups.com] On
> > Behalf Of Tom Husband
> > Sent: Thursday, November 10, 2005 11:41 PM
> > To: QuadtoneRIP@yahoogroups.com
> > Subject: [QuadtoneRIP] Getting dMin down
> >
> > I'm creating some cool and warm curves for Moab Kayenta and a 2200
> > with UT7 ink.  I'm happy with the dMax of 1.600 but dMin is running
> > 0.130.  Ideally shouldn't it be 0.000?  How would I get it there?  If
> > I were to increase the value of the Gray Curve Highlight would it
> > bring the dMin down?  Right now I have the highlight at 4.
> >
> > Thanks,
> >
> > Tom
> >
> >
> >
> >
> >
> >
> >
> > Yahoo! Groups Links
> >
> >
> >
> >
> >
>
>
>
>
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