Datacolor User to User Support Group.

>
> I used PhotoShop to Soft Proof the adobe church using 5 profiles
> (PrintFix Pro 225 and 225 with grays, Ilford profile for R1800 and
> their Pearl paper, Epson's profile for their glossy Photo and a
> Profile Prism profile for Epson glossy and the R1800). All profiles
> show the blotches in the sky but at different places. The Printfix
> profiles show the blotches at the top and across the crosses
> depending on the intent. Other profiles are at different places in
> the sky. Darkening or lightening the sky moves the blotches up or
> down but does not completely eliminate them. I think this is just a
> tough test for any profile; I have not printed the church so I don't
> know if it's visible on an actual print.
>
>

Try printing and measuring 729 patches, and use those colors in
combinations with your grays measurements. I've done some recent
testing and closer evaluation of the R800 (same inks as yours, just
smaller paper) and it really needs the extra patches to avoid problems
in certain areas; the R800/R1800 is tricky to profile with fewer patches
because of its inkset (the extra red and blue inks) and what I found
is that with 225 patches, I was getting too much saturation and some
loss of smoothness in faces.

(this was on both Premium Luster and Harman Gloss)

So from now on, I'm using 729 patches, always, for the R800, and I've
also done a similar profile for the Canon 9500, also on Harman Gloss,
with 729 patches plus 238 grays.
>

David Miller
Senior Software Developer, Digital Color Solutions
Datacolor