QTR-Quadtone RIP

Hello,

I've been evaluating he ICC profile creation tools of QuadToneRIP and
trying to understand my results with it. My interested is specifically
in the profiling tools, so I wanted to try it before buying.

I was able to successfully profile my Epson 3800 using ABW mode and
Canson Infinity Baryta 310g/m2 paper, but the resulting profile seems to
be almost neutral. Soft proofing with it gives me no tonal changes, only
paper / ink color simulation, and prints of the 21 step target show
roughly the same values as before profiling.

I've done a fair bit of homework before coming here and the only
explanation I've come with is that my printer was pretty linear by
default. I've used the Gray gamma 2.2 target provided by Paul Roark,
since most of my images are in AdobeRGB colorspace and I print a lot
from Lightroom. Using the original untagged target from the Eye-One
folder gives me the same results (almost no change by applying profile),
but a totally different gamma curve, as expected.

In an attempt to troubleshoot it, I've profiled a HP black and white
laser printer. This device was highly unlinear to begin with and, this
time, I was able to see a big change on the curves after outputting with
the ICC profile.

Could anyone help me to assess these results and try to understand what
is going on? Why don't I see any change on the profiled prints?

Listed below are all my settings, measurements and results.

Measurement device: SPyder3Print. Direct export in QTR ICC profiling
format.

Epson 3800, ABW mode, Canson Baryta 310g paper
Original 21 step target bundled with QTR
Measurements used to profile http://pastebin.com/rHd7Yvue
<http://pastebin.com/rHd7Yvue>
After profile http://pastebin.com/hSpZaF5m
<http://pastebin.com/hSpZaF5m>
Visual comparison of the two tonal responses
http://i.imgur.com/FC2Ar.png <http://i.imgur.com/FC2Ar.png>

Epson 3800, ABW mode, Canson Baryta 310g paper
Paul Roark Gray gamma 2.2 target
Measurements used to profile http://pastebin.com/cj6dcDdg
<http://pastebin.com/cj6dcDdg>
After profile http://pastebin.com/UrEL5qV9
<http://pastebin.com/UrEL5qV9>
Visual comparison of the two tonal responses
http://i.imgur.com/NBVPk.png <http://i.imgur.com/NBVPk.png>

Epson 3800, black only mode, lesser grade photo paper
Paul Roark Gray gamma 2.2 target
Measurements used to profile http://pastebin.com/Z4ZTkgr3
<http://pastebin.com/Z4ZTkgr3>
After profile http://pastebin.com/4iqzpENB
<http://pastebin.com/4iqzpENB>
Visual comparison of the two tonal responses
http://i.imgur.com/UfaWv.png <http://i.imgur.com/UfaWv.png>

Hp 2025dn, grayscale mode, plain paper
Paul Roark Gray gamma 2.2 target
Measurements used to profile http://pastebin.com/XfwmaVJy
<http://pastebin.com/XfwmaVJy>
After profile http://pastebin.com/1y5HgrBu
<http://pastebin.com/1y5HgrBu>
Visual comparison of the two tonal responses
http://i.imgur.com/zJUSc.png <http://i.imgur.com/zJUSc.png>

Thank you for your help,

Fabio Pili




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