QTR-Quadtone RIP

Hello,

my name is Gottlieb and I'm new in this group.

I'm trying to create some grayscale ICC profiles for the Epson 3800
ABW driver using the QTR-Create-ICC.exe and Datacolor Spyder3Print
(also knwon as PrintFix PRO with the Datacolor 1005 device).

On my glossy proof paper the Epson 3800 ABW (dark setting) is almost
linear as it should be.

The generated Grayscale ICC Profile should only correct the L* curve
only marginally. But instead it seems that the calibration does the
contrary.

But may be the caibration does all right and I make an error in
reasoning or calibrating.

The way I created the grayscale ICC profiles was the following:

1) Open the file "Step-21-gray.tif" in Photoshop CS2 without CMS

2) Print it with no CMS and the Epson 3800 ABW driver set to the
setting "Dark"

3) Let the print dry over night

4) Read the 21 Patches with Spyder3Print and save it to an Create-ICC
formated file.

5) Drag the file to QTR-Create-ICC.exe

6) Install the Profile

7) Open "Step-21-gray.tif" in Photoshop CS2 without CMS

8) Print it with CMS managed by Photoshop, the QTR-ICC pofile and the
Epson 3800 ABW driver set to the setting "Dark" with the same media
settings

9) Read the 21 Patches with Spyder3Print and save the L* vaules to an
file.

10) Import the L* Values from the file of step 4 and 9 into an
spreadsheet an compare them

The resulting graph and the L* values can be found here:

http://www.ironsys.de/pub/yahoo_qtr_group/profile-graph-1.gif

(The color profile was generated with Spyder3Print)

I hope someone can help me.

Thanks,
 Gottlieb