Re: **To 3000 or not to 3000**

[Dan Culbertson <danculb@concentric.net>]

> Out of curiosity, what are the results of using the Cone Piezographic inks
> with the Epson driver, setting the output to color?

Marginal.  The dark gray ink prints in the highlights with a dotty look.  It
can be improved (somewhat) by partitioning the inks into the correct tonal
zones with the below "colorization" procedure but a good manual CMYK channel
separation printed though a RIP is much better (though much more complex).

Partitioning Piezograpy BW (TM) ink channels for the Epson RGB driver

1.  After the grayscale image is fully adjusted on the screen convert it to
RGB (use your standard RGB Setup space).

2.  Add a "Selective Color" adjustment layer.  Set it to "Absolute" and
enter the following in the drop down dialog box: under "Whites" use Y=100
and subtract some Magenta and Cyan.  Under "Neutrals" use Magenta = 100 and
subtract a little Cyan and Yellow.  Under "Blacks" subtract 20 Cyan, 40
Magenta, and 50 Yellow (more or less).

3.  In the Layers Palette change the Blending Mode of the Selective Color
adjustment layer to "Color" (ie change it to "Color" from "Normal") and
leave the opacity at 100% (you can do this while you are creating the
Selective Color layer but if you forget you can change it later in the
Layers Palette).

4.  Print it through the Epson driver using the correct media type but
select "No Color Adjustment" in the color adjustment dialog box.

Print a gray ramp first and keep adjusting the above values until you get an
even well-separated ramp for the paper you are using.  Save these settings
and load them whenever you want to print.

Dan Culbertson

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