Datacolor User to User Support Group.

On Sep 4, 2009, at 1:02 AM, Bob Petruska wrote:

> So you are saying that from my data that the measured greys look  
> fine and that I will get the best possible match to the monitor  
> image at this point.

No, I'm saying the tools are doing their job correctly, and the  
problem lies elsewhere: in metamerism in the Canon dye inks,  
especially under incandescent light, and yet worse under commercial  
lighting.
>
> Makes sense that the blood red car printout is better matched with  
> the Canon standard driver if the mid grey has more red and blue in it.

No, these are not matrix profiles where all color balances are defined  
by just three color numbers. Your reds match because of measurements  
that were made at red, not at gray. Making bright colors "extra  
pretty" is something that standard driver settings are known for. One  
company's standard setting had a name like "photo enhance", another  
that doesn't come to mind was even more blatant about the fact that it  
was going to juice up your colors for you.  But the Saturation intent  
in Datacolor profiles typically offers more realistic, yet more  
saturated colors, than any other option. So don't finalize your views,  
until you try it with inks that don't suffer the metamerism issues you  
are now seeing.
>
> I don't know where to go from here.

I've suggested several times that the way to go is to an inkset that  
doesn't suffer these issues. You've stated that you intend to move to  
a Canon Pro9500. So instead of gnawing this bare bone non-stop between  
now and then, I'd suggest giving it a rest until you have a 9500 to  
work with.

C. David Tobie
Global Product Technology Manager
Digital Imaging & Home Theater
CDTobie@...