RE: Piezography Quad inks through Epson driver (was PR's curves)

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<x-charset iso-8859-1>Thanks, Paul. These files load OK.
Happy New Year!
mike

-----Original Message-----
From: owner-epson-inkjet@leben.com
[mailto:owner-epson-inkjet@leben.com]On Behalf Of Paul Roark
Sent: 29 December 2000 17:03
To: epson-inkjet@leben.com
Subject: Piezography Quad inks through Epson driver (was PR's curves)


Remko, Mike & other Piezo fans,

The attached curves were made in Photoshop 6.0.  I'm not sure if they work
with other versions of the program.  They should work for both Mac and
Windows. (I'm on Windows, Jerry is on a Mac, I believe.)

They allow one to print Piezo quad inks through the Epson driver -- with the
Error Diffusion algorithm fully operational.  For both the 1160 and the
3000, this might result in better images.  The blacks are deeper, and the
Error Diffusion should help smooth out the micro banding of the printers
(these machines are seldom perfect).

To use the curves adjustments, put the attached files in the Photoshop 6.0
folder.

There are two curves files because each is optimized for a different type of
image.  PzoRGB3 is Jerry Olson's favorite.  According to my tests it gives
the smoothest results in the dark tones (70% - 100%).  It also does well
above that, but PzoRGB2, according to my tests, is smoother from 50% to 0%
(the lighter tones).  (If you want to average them, make a duplicate layer,
apply one to each and flatten at 50%.)  The trick is that at some point the
relatively dark cyan ink has to be used.  Where that kicks in may show
slightly on a 3000.  (On an 1160 you'll never see dots with these curves,
even with a loupe.)

The working grayscale file is converted to RGB mode only for printing.
Apply the curves and the image turns brightly colored, with yellow
highlights.  (You can put the mode change and curves application in an
"Action" and on a function button.  F2 on my computer is PzoRGB2, F3 is
PzoRGB3.)

When you print the RGB file, use the Epson printer driver the way you would
for a high quality color image.  The paper type is Epson Photo Quality Ink
Jet Paper.  However, these curves are profiled for Archival Matte paper;
they seem to work well with most matte papers.  On the last dialogue box of
the Epson driver (of my 1160, the 3000 may be different) check "No Color
Adjustment" in the Color Management section.

(My machine is basically set on the Photoshop 5 default color settings.  I'm
not sure if these matter that much.)

I'm particularly interested in how these curves do on Epson 3000s.  Does the
Error Diffusion help the banding problems?

Good luck.

Paul Roark
Solvang, CA
http://www.silcom.com/~proark/photos.html




-----Original Message-----
From: owner-epson-inkjet@leben.com
[mailto:owner-epson-inkjet@leben.com]On Behalf Of Remko de Graaff
Sent: Friday, December 29, 2000 1:16 AM
To: epson-inkjet@leben.com
Subject: RE: Paul Roark's curve


are this curves only for special version of Photoshop?

Loading it into my PS 5.02 gives the messages "not compatible for this
version"

also the txt file cannot be red.

I am using a PC and if this is only for the Mac is it possible to convert?

remko

-----Oorspronkelijk bericht-----
Van: owner-epson-inkjet@leben.com
[mailto:owner-epson-inkjet@leben.com]Namens Jerry Olson
Verzonden: vrijdag 29 december 2000 1:15
Aan: epson-inkjet@leben.com
Onderwerp: Re: Paul Roark's curve


Ron, you are the third person to say the curves don't work for you.
Others say they work fine. I'm on a mac too. I'll send you the curve
again, and here's paul's e mail, so you could get it directly from him.

proark@silcom.com

I'm sending you all 4 of Paul's curves. Be sure your image is rgb mode
before applying. THe first one is for the 1160, piezo inks, and epson
driver The second is the same curve with a different name. Try each and
see if one works. The next 2 are for the 3000 epson printer, epson
driver, and piezo inks. All should be used on epson archival papers.

I am astounded with the 3rd rgb curve. It gives a totally dotless print
from the 3000, with fantastically deep blacks, with the epson driver. NO
dots, Deep blacks! (printed at 1440 DPI.)

Jerry





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