QTR-Quadtone RIP

I am attempting to create a QTR curve for Epson Premium Semi Gloss paper using the Epson 1290 and UT2 inks.

I am using EPremLuster-neutral-3.qidf as a template

I have printed out the step wedge on the Semi Gloss paper, measured the patches, entered the values into the Curve Creator and saved this as EPremSemiGls-neutral-3.qidf. Tom Moore's tutorial then says "....use the Create Curve button to create the Linearized version of your curve". There is no Create Curve button - just a Show Curve where the Create Curve button should be.

My QTR version is 2.7

Any help please ?  

--- In QuadtoneRIP@yahoogroups.com, "Mel" <chilterns@...> wrote:
>
> I am about to create QTR curves for the Epson 1290 using MIS UT2 inks for a variety of papers.
> 
> I am starting with Epson Premium Semi Gloss and Epson Glossy Photo Paper, as I have these to hand.
> 
> I am using Tom Moore's User Guide for the Epson 2200 and have a number of queries.
> 
> I have printed off the Ink Separation Test Page for each paper, no problem.
> 
> It's appreciated that for the Epson 2200 there are only two inks to consider, however for the Epson 1290 there is Black, but no Light Black, just C, M, Y, LC, and LM.
> 
> I also notice that when using Epson Premier Lustre paper with UT2 ink and neutral tone, Black is not used, just C, M, LC, and LM and with Epson Enhanced Matte all "colours" except Yellow are used.
> 
> On page 15 of the guide it says, to quote - "For Quadtone inks, this process is repeated for each lighter ink, comparing it to the next darker ink, calculating its density relative to that ink and then converting it to a density relative to black". Are all the inks used in this process, as it would seem strange to convert relative to Black if Black is not used ?
> 
> In the statement "......repeated for each lighter ink", how is "lighter" decided. Is it arrived at by comparing the density of the most dense patch (100% of each "colour") as measured below, ignoring K in this case i.e. light to dark being LM, Y, LC, M and C.
> 
> As the design of the curves has been done for the Epson 1290 could someone please explain how this is done, in a similar way to how it is described in Tom's guide.
> 
> Taking Visual readings with an X-Rite 810 densitometer I get the following readings of the most dense patch (100%) 
> 
> K (Matte) 1.83
> C         2.15
> M         1.9
> Y         1.02
> LC        1.04
> LM        0.98
> 
> A further point - am I correct in using the X-Rite 810 Visual channel setting for evaluation of these "coloured" inks ?
> 
> I really do need some help here.
>