'The Shape of Colour' for Inkjets
'The Shape of Colour' for Inkjets
I am following the threads on building profiles for inkjet printers (I am
especially interested in the Epson range, although it seems there are no
definite answers as to the correct settings for any inkjets, or am I just
missing something !
I have Colorblind Professional 3.6 (Mac) and PrintOpen 4 (PC)
I have been making adjustments to the settings within Colorblind
Professional 3.6, building profiles with the 1441 patches, and I have
changed the setting from and to:
Default CLOSEST MY 70% K Theory
Total Dot 330 180 180
Max Black 90 100 100
Black Weight 7.0 5.0 7.0
Black Start 0 0 70
Greg GCR 0 0 0
Color GCR 100 0 0
Delta Average 1.92 1.15 1.33
Peak 4.19 3.00 6.46
Standard Dev 0.92 0.50 0.99
I have changed the 'Total Dot' and 'Max Black' to match the settings used
with the 'canned' profiles that came with the BEST RIP.
Dropping the 'Color GCR' has enabled me to keep the density of colour in my
black areas of the image.
On the 'CLOSEST' settings I get the best Delta, but I get 90 of the patches
printing correctly, although the other 10% print the targets with a heavy
black stipple.
On the 'MY 70% K Theory' settings, I am down to 5% of the colors (patches)
with the black screen, but my deep black areas begin to break up.
The incorrect colors are where the 10% black is applied to the smaller
values of the CMY. In ColorBlind it it is the 1R 33 to 1a 41 on the 1441
patches tests. When these profiles are used within the BEST RIP, they also
appear with the heavy black screen over the light colors.
Doing a test by printing out squares with :
(I have put the values for the first 15 squares, just keep adding
percentages of magenta until you get to 100%.)
1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15.
C 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
M 0 0 0 0 0 0 0 10 10 10 10 10 10 30 30
Y 0 10 30 55 80 94 100 10 30 55 80 94 100 10 30
K 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10
I have also realized that the 'canned' profiles that come with BEST 4.2.1
also have this unattractive black screen, although it is only in a small
number of colors, and I wonder if the BEST RIP can actually send the printer
the correct data.
Can anyone shed any light on this issue ?
Do I have to wait for the upgrade to ColorBlind 4 (or an other profiling
software package upgrade) to successfully profile an Epson ?
Darrin.