Datacolor User to User Support Group.

Hi all,

I have a odd silly question in regards with the whole targets used with Printfix Pro spectrometers.

I've got some 6 Eboni inks from inksupply in my R1800 printer, which are different shades of black, dark brown and cyan's (NO RED or GREENS, MAGENTA). I was wondering if I were to print the normal "FAST TARGET" of 150 patches on 1 Sheet, (knowing full well the "FAST TARGET" encompasses many myriad of red, blues, green, (etc) colors) on my 6 Eboni ink R1800 printer. 
What purpose if any would this be in measuring this outputted target?

If I did measure the target, would I be able to make an ICC profile based on my 6 inks? 

If I loaded this ICC profile into Photoshop and used it as my RGB color workingspace, would I know my color gamut and see if any clipping occured(View:Gamut Warning) in any my images? Like I said above Eboni 6 inks, (black. dark browns and cyans), say I had loaded an image with Red roses, then all the Red in the image would show up as Gamut Warning?

What would be the purpose of all this you ask, well I want to know where my colors lie in the colorspace and utilizing the maximum part of the colorspace, in the interelated inks I have.

Cheers
Jag24x

If the densities you're using differ from the densities of the color inks you can't use the Epson driver and an ICC workflow.  

I'm not aware of any inkset using "Eboni" (I think you just mean various MIS B&W inks) that come in multiple shades that are specifically made for the R1800.  The stock approaches are 3 MK (have to use QTR) and Eboni 6, which are dilutions of pure matte black (Eboni MK) and don't have cyan as you mention.

I used 6 B&W MIS inks in my R220 (some warm, some cool from the UTR2 inkset) and profiled it using PFP.  I didn't really find soft-proofing to be accurate for color, and could only make *very* slight changes in tone without density reversals and other major image problems.  I think the UT-3D approach might work better than this but it's too complicated for me.

These days I still use the 6 ink approach (cyans cool,magentas warm, PK and Y cool) and use the Epson driver sliders to vary between more cyan (cool) and more magenta (warm) and use PFP to linearize this by printing a 21 step grayscale and using the QTR-Create-ICC feature.

Roger



--- In datacolor_group@yahoogroups.com, "jag24x" <jag24x@...> wrote:

>
> Hi all,
> 
> I have a odd silly question in regards with the whole targets used with Printfix Pro spectrometers.
> 
> I've got some 6 Eboni inks from inksupply in my R1800 printer, which are different shades of black, dark brown and cyan's (NO RED or GREENS, MAGENTA). I was wondering if I were to print the normal "FAST TARGET" of 150 patches on 1 Sheet, (knowing full well the "FAST TARGET" encompasses many myriad of red, blues, green, (etc) colors) on my 6 Eboni ink R1800 printer. 
> What purpose if any would this be in measuring this outputted target?
> 
> If I did measure the target, would I be able to make an ICC profile based on my 6 inks? 
> 
> If I loaded this ICC profile into Photoshop and used it as my RGB color workingspace, would I know my color gamut and see if any clipping occured(View:Gamut Warning) in any my images? Like I said above Eboni 6 inks, (black. dark browns and cyans), say I had loaded an image with Red roses, then all the Red in the image would show up as Gamut Warning?
> 
> What would be the purpose of all this you ask, well I want to know where my colors lie in the colorspace and utilizing the maximum part of the colorspace, in the interelated inks I have.
> 
> Cheers
> Jag24x
>