QTR-Quadtone RIP

Yes David thanks very much for your advice and trouble - that's a great help.

Mel

--- In QuadtoneRIP@yahoogroups.com, "David" <dpgoldenberg33@...> wrote:
>
> Mel,
>    I haven't used UT2 or the Epson 1290, but I have made curves for UT14 and the Epson 1440.  I think that the two inksets are similar, except for the sepia ink in the yellow position of UT2.  UT14 doesn't have sepia.
> 
> I don't have a full tutorial, but here are some suggestions of how to get started.:
> 
> 1. For a given paper, plan to make at least two curves, one for cool and one for warm.  Depending on your interests, you may want to make a third set that includes the the sepia.  After you make the curves, you can control the tone of your prints by mixing the warm, cool and sepia curves using QTR.
> 
> 2. For a glossy paper (and lustre papers, I think), use the Photo Black ink.  For matte papers use the Eboni black.
> 
> 3. Make a print of the ink separation file and measure the densities, by whatever means you have available.
> 
> 4. For each of the curves, the black ink will be the most dense, so you set the overall ink limit based on the level that gives you the maximum density.
> 
> 5. For the cool curve, there will be two additional inks, the cyan and the light cyan.  Follow the instructions in the tutorials for how to set the relative densities of these inks. 
> 
> 6. For the warm curve, the two additional inks will be magenta and light magenta.
> 
> Now, having written the above, I just took a look at the UT2 curves that are provided with QTR.  It looks as though the warm curves use just black, magenta and light magenta, as I described above.  But, the cool curves include a little bit of magenta and light magenta along with the cyan and light cyan.  I don't know why that would have been done.  Perhaps Roy, or whoever created the curves, thought that the cyan and light cyan were too cool, or maybe it was to get smoother gradations.  In either case, I think that the same effect could be obtained by mixing a warm and cool curve within QTR.
> 
> For a sepia curve, you can start with the warm curve and add in the sepia.
> 
> After generating initial curves, you will need to linearize them, as described in the tutorials.
> 
> I hope this is a bit of help.
> 
> David
> 
> --- In QuadtoneRIP@yahoogroups.com, "Mel" <chilterns@> wrote:
> >
> > Well I just answered my own question.
> > 
> > I opened the Curve Creator tool and looked at the inks Roy has used.
> > 
> > The UT2 Black ink is not actually used with the Luster paper it's just a mixture of rest in the positions of C, M, LC and LM with addition of Y for Sepia.
> > 
> > It would be nice if someone could produce a step by step "Idiots Guide" for we 1290 users for producing QTR curves - surely someone has done their own curves for this printer.
> >  
> > Mel 
> > 
> > --- In QuadtoneRIP@yahoogroups.com, "Mel" <chilterns@> wrote:
>