Datacolor User to User Support Group.

On May 5, 2010, at 2:05 PM, Don Ament wrote:

>
> Well, it's getting weird, this will be hard to follow I suspect:
>
> I reprinted page 1 of the 225 EZ color target using the Colorsync/ 
> Generic RGB method and it is way off. Super saturated, dark, colors  
> way off. My original page one, printed with Vendor Matching is  
> actually pretty close to what the target looks like on my Spyder  
> calibrated monitor.
>

Actually, what you've done is correct!

The target is SUPPOSED to be super saturated and dark. That's what  
"uncalibrated" looks
like, and that's what you want to get. This gives you the full  
printable "Gamut" of the paper
and ink in the target print. The profile then works within that to  
make adjustments when
you're actually printing.

Your original target print, printed through Vendor matching, is WRONG,  
because it's not
supposed to look like the target image on the calibrated screen (this  
is wrong, because
it not only confirms what I said before, but it's also telling you  
implicitly that
you've just made a calibrated target print, i.e. through a printer  
profile, because
it looks "nice", pretty, light, and... calibrated! Just like on your  
display. Which
is NOT what you want to be happening here).

> So, I poked around the Canon driver.

<SNIP>

No need to go through anything else you've noted here. Re-read the  
above. Your
dark, super saturated, colors way off target print IS the right one.

Measure that, build a profile from those measurements, and you'll have  
a correct
profile.


David Miller
Senior Software Developer, Digital Color Solutions
Datacolor