Digital BW, The Print

Bob, you wrote:

> What sort of test image should one use to look for the colorbase 
> corrections?


To see whether the printer is linear after calibration ?   A 
CMYK linearisation target from one of the other RIPs. You 
could use the Colorbase one but it has an odd range of density 
numbers + an odd distribution of the patches over the area. I 
have a Wasatch SoftRip CMYK one that could be used. Problem is 
that if you send it through Colorbase the calibration isn't 
used, if you send it over the driver it will go through the 
CMYK>RGB>CcMmYKkk conversions. The Stylus RIP is I believe 
also an RGB driver so that one wouldn't help. Any other RIP 
bypasses the calibration I guess.

I guess we should make an RGB target that should deliver 
specific CcMmYKkk patches when printed without a profile on a 
new or very good calibrated printer and use that as a 
reference for everyone. Can't think of another method.

To check the quality of a normal print through the Epson 
driver including an Epson profile ?  I normally use the Fuji 
test image.
                    --
           Ernst Dinkla


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