QTR-Quadtone RIP

I'm creating some 2400 curves for Silver Rag and am using the
IlfordSmPearl-neutral-cool as a starting point.  I noticed that the
linearization values starts with the 100% value in the upper left but
with other papers and my old 2200 it's the opposite.  Tom Moore's
excellent user guide also says 0% should start in the upper left. 
Does it matter?

Thanks,

Tom

It must not matter if the IlfordSmPearl curves work but I just wondered.  

Tom

--- In QuadtoneRIP@yahoogroups.com, "Tom Husband" <tom.husband@...> wrote:

>
> I'm creating some 2400 curves for Silver Rag and am using the
> IlfordSmPearl-neutral-cool as a starting point.  I noticed that the
> linearization values starts with the 100% value in the upper left but
> with other papers and my old 2200 it's the opposite.  Tom Moore's
> excellent user guide also says 0% should start in the upper left. 
> Does it matter?
> 
> Thanks,
> 
> Tom

--- In QuadtoneRIP@yahoogroups.com, "Tom Husband" <tom.husband@...> wrote:
>
> I'm creating some 2400 curves for Silver Rag and am using the
> IlfordSmPearl-neutral-cool as a starting point.  I noticed that the
> linearization values starts with the 100% value in the upper left but
> with other papers and my old 2200 it's the opposite.  Tom Moore's
> excellent user guide also says 0% should start in the upper left. 
> Does it matter?

I think you'll find that whether the biggest or smallest number is in
the first box depends on whether the values entered are Luminosity (ie
L* channel) or density/DMAX. When using an Eye One with
QTR-Linearize-Data, the linearization values you get are L* instead of
density.

OK thanks.  So if I m creating a custom curve from the IlfordSmPearl-neutral-cool curve but using a densitometer (DMAX) I should reverse the input and put 0%

The way to think of it is that it's always white-to-black.  So "white" in density is
the smaller number but "white" in Lab values is the larger number.

Roy


--- In QuadtoneRIP@yahoogroups.com, "Tom Husband" <tom.husband@...> wrote:
>
> OK thanks.  So if I'm creating a custom curve from the
> IlfordSmPearl-neutral-cool curve but using a densitometer (DMAX) I should
> reverse the input and put 0% in the upper left?
> 
> Tom
> 
> On 7/11/06, jkohn_home <jkohn_home@...> wrote:
> >
> > --- In QuadtoneRIP@yahoogroups.com, "Tom Husband" <tom.husband@> 
wrote:

> > >
> > > I'm creating some 2400 curves for Silver Rag and am using the
> > > IlfordSmPearl-neutral-cool as a starting point.  I noticed that the
> > > linearization values starts with the 100% value in the upper left but
> > > with other papers and my old 2200 it's the opposite.  Tom Moore's
> > > excellent user guide also says 0% should start in the upper left.
> > > Does it matter?
> >
> > I think you'll find that whether the biggest or smallest number is in
> > the first box depends on whether the values entered are Luminosity (ie
> > L* channel) or density/DMAX. When using an Eye One with
> > QTR-Linearize-Data, the linearization values you get are L* instead of
> > density.
> >
> >
> >
> >
> >
> >
> >
> >
> > Yahoo! Groups Links
> >
> >
> >
> >
> >
> >
> >
> >
>