Digital BW, The Print

I've read the article http://www.paulroark.com/BW-Info/UT14.pdf explaining the use of the UT14 ink set and understand it. I've also worked with QTR and created ICCs for RR Art White and Polar Matte papers. But how do I create an ICC for glossy paper?

The UT14 instructions state that the Ebony black should not be used on glossy papers and that the blacks should be created using a blend of the Cyan and Magenta ink positions. I don't believe that QTR takes this into account. How does one go about shutting down the black position and making the printer print blacks using blends of other cartridges?

QTR will take this into account if you click <Not Used> under K, then tell QTR that C = black (by setting its density = 100). To see examples of this, you can download some of Paul's glossy UT14 curves.

--- In DigitalBlackandWhiteThePrint@yahoogroups.com, "remononaz1" <homershannon@...> wrote:

>
> I've read the article http://www.paulroark.com/BW-Info/UT14.pdf explaining the use of the UT14 ink set and understand it. I've also worked with QTR and created ICCs for RR Art White and Polar Matte papers. But how do I create an ICC for glossy paper?
> 
> The UT14 instructions state that the Ebony black should not be used on glossy papers and that the blacks should be created using a blend of the Cyan and Magenta ink positions. I don't believe that QTR takes this into account. How does one go about shutting down the black position and making the printer print blacks using blends of other cartridges?
>

"remononaz1" <homershannon@...> wrote:
>
> I've read the article http://www.paulroark.com/BW-Info/UT14.pdf explaining the use of the UT14 ink set and understand it. I've also worked with QTR and created ICCs for RR Art White and Polar Matte papers. But how do I create an ICC for glossy paper?
> 
> The UT14 instructions state that the Ebony black should not be used on glossy papers and that the blacks should be created using a blend of the Cyan and Magenta ink positions. I don't believe that QTR takes this into account. How does one go about shutting down the black position and making the printer print blacks using blends of other cartridges?
>


The profiles I made use Photoshop curves (in the Zip file) embedded in ICCs, and for glossy paper these curves avoid using the Eboni by having one of the color curves go to 0% at the maximum black point.  The M and C inks (Green and Red curves, respectively) are PK density inks.  With the driver at "No Color Adjustment," either or both of these inks generate a very good dmax on glossy papers.  Look at the curves in the Zip file.

Paul
www.PaulRoark.com

Thank you, Paul. 

Am I correct that the zip file you are referring to is the file http://www.paulroark.com/BW-Info/1400-Profiles.zip in the document UT14.pdf?

These profiles do not include RR Arctic Polar Gloss. Are any of them well suited for that paper? If not, how would you go about changing the ramp without changing the color curve / cartridge assignments? (Maybe I can answer my own question: using an .acv to control the cartridges, run QTR to create a new .icc then run the new .icc with the .acv?)

Also, to make these perform, I need to load the .acv file into the curves profile in the image and then print with appropriate .icc. Correct?

Homer Shannon

--- In DigitalBlackandWhiteThePrint@yahoogroups.com, "pr_roark" <roark.paul@...> wrote:

>
> "remononaz1" <homershannon@> wrote:
> >
> > I've read the article http://www.paulroark.com/BW-Info/UT14.pdf explaining the use of the UT14 ink set and understand it. I've also worked with QTR and created ICCs for RR Art White and Polar Matte papers. But how do I create an ICC for glossy paper?
> > 
> > The UT14 instructions state that the Ebony black should not be used on glossy papers and that the blacks should be created using a blend of the Cyan and Magenta ink positions. I don't believe that QTR takes this into account. How does one go about shutting down the black position and making the printer print blacks using blends of other cartridges?
> >
> 
> 
> The profiles I made use Photoshop curves (in the Zip file) embedded in ICCs, and for glossy paper these curves avoid using the Eboni by having one of the color curves go to 0% at the maximum black point.  The M and C inks (Green and Red curves, respectively) are PK density inks.  With the driver at "No Color Adjustment," either or both of these inks generate a very good dmax on glossy papers.  Look at the curves in the Zip file.
> 
> Paul
> www.PaulRoark.com
>

"remononaz1" <homershannon@...> wrote:
>

> Am I correct that the zip file you are referring to is the file http://www.paulroark.com/BW-Info/1400-Profiles.zip in the document UT14.pdf?


Yes.

 
> These profiles do not include RR Arctic Polar Gloss. Are any of them well suited for that paper? If not, how would you go about changing the ramp without changing the color curve / cartridge assignments? (Maybe I can answer my own question: using an .acv to control the cartridges, run QTR to create a new .icc then run the new .icc with the .acv?)



Yes, find the acv curve that is for the right type of paper -- glossy or matte -- and has the tone you want.  Then print an Adobe RGB 21-step test file with it.  Read the test file and dump the text output into QTR's Create ICC-RGB.  That should linearize the curve for the new paper.  See http://www.paulroark.com/BW-Info/Embedding_Photoshop_Curves_in_ICCs.pdf for more information on making these ICCs.

If you want to change the tones of the curve, note that the cyan and magenta channels are the same density.  So, you can raise and lower the curves, point by point, to change the tones and have the final densities stay close enough to linearize with Create ICC-RGB.


> 
> Also, to make these perform, I need to load the .acv file into the curves profile in the image and then print with appropriate .icc. Correct?


The curves end up in the ICCs.  After the ICC is made, you edit a grayscale file and print it, without a curve, loading the ICC in the Photoshop print (or print preview) step.

Hope this helps.

Paul
www.PaulRoark.com