QTR-Quadtone RIP

Bill,

There are a lot of profiles for the 3800/UC inks already in the download.  I'd
first try these -- I think you'll find them at least a very good
start.  If you really
want to make some of your own, look at how the existing ones work.

Roy

On 10/19/07, etlblbt <bill.brandt@...> wrote:
> Thanks to everyone who replied.  I have access to a microscope so I
> took a part of the print and examined it visually at a magnification
> where I can see the individual ink dots.  I can see that all the dots
> are grey and there are no other colours being laid down so my only
> conclusion is that the grey inks are not truly neutral and do have a
> warm tone to them (or there is some tone coming from the paper).
>
> So now it looks like I am going to have to use the toning channels to
> bring the print back to a true neutral.  Is there a good method for
> establishing how to set the toning channels to achieve a neutral
> print?  I have access to an eye-one.
>
> Bill
>
> --- In QuadtoneRIP@yahoogroups.com, "Michael King" <drmrking@...>
> wrote:
> >
> > Also what your spectro reads is going to depend on the colour of
> the paper
> > the inks are printed on.
> >
> > On 18/10/2007, Michael King <drmrking@...> wrote:
> > >
> > > Isn't that because the blacks are not neutral. They are naturally
> warm
> > > carbon?
> > >
> > > Mike
> > >
> > >
> > >  On 18/10/2007, etlblbt <bill.brandt@...> wrote:
> > > >
> > > >   Hello,
> > > > I have just started trying quadtone RIP and I have tried to make
> > > > my first profile for my EPSON R2400 which is loaded with the
> standard
> > > > inkset. In the ink descriptor file I have set the density
> values for
> > > > the light black and light light black inks (measured using a
> > > > spectrophotometer) and have set all the other inks to 'not
> used'.
> > > >
> > > > When I print out a test strip (the 21x4 random) and analyse it
> with my
> > > > spectrophotometer I can see that the colours are not neutral
> (when
> > > > converted to RGB there is quite a lot less blue than the other
> two
> > > > channels) and the print visually has a brownish tone.
> > > >
> > > > Is there something else I need to do to prevent the colour inks
> from
> > > > being used other than setting them to 'not used' in the ink
> descriptor
> > > > file.
> > > >
> > > > Apologies if this is all in a FAQ somewhere. If you could point
> me to
> > > > it that would be great.
> > > >
> > > > Regards, Bill Brandt
> > > >
> > > >
> > > >
> > >
> > >
> >
> >
> > [Non-text portions of this message have been removed]
> >
>
>
>
>
>
> Yahoo! Groups Links
>
>
>
>