Datacolor User to User Support Group.

On Feb 17, 2009, at 7:23 PM, Michael de Courcy wrote:

> my nozzle cleaning and printed test left seemed to be excellent  and  
> consistent with what i was getting before the shift. my reason for  
> re-profiling was that if there had been a shift in the ink colors i  
> could readjust with a new profile. wouldn't that make sense ? i was  
> hoping that the shift might be the result of some obscure adjustment  
> deep in photoshop or the printer driver which i am not aware of.

When your colors shift significantly, in a short amount of time,  
reprofiling may or may not offer the fix you need, but even if it  
does, it is likely to be a bandaid solution for a different underlying  
issue. That issue is typically inks or heads, but once I saw that you  
are using a CIS, the likely blame moved to there. My experience is  
that most such shifts, if they don't show in a jet test, have to do  
with the CIS delivery system and the ink it delivers. If reprofiling  
solves your problem, and leaves you with acceptable results and a  
reasonable color gamut, thats wonderful. If it does not, or if further  
shifts continue to occur, please keep in mind where the source of the  
issue is likely to lie. And don't make the mistake of blaming your  
profile for issues that are caused by your printer, media, inks, or  
CIS; as is often done, since the results are 'bad color'...

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