Re: blues turing purple and reds turning orange
Re: blues turing purple and reds turning orange
- Subject: Re: blues turing purple and reds turning orange
- From: "Bob Frost" <email@hidden>
- Date: Sat, 27 Jul 2002 16:39:08 +0100
Roger,
I'm no expert, but surely you just leave the printed target that you are
going to use for profiling until it has finished drying. Following other's
advice, I always leave printed targets 24-48 hrs before profiling them.
Bob Frost.
----- Original Message -----
From: "Roger Breton" <email@hidden>
To: <email@hidden>
>
I think the problem is not one of gamut mapping which, if that's what it
is,
>
is well illustrated graphically on your site, Bruce. The way I understood
>
Steve's original post is that he's confronted with an "ink drying"
problem,
>
in that the blues he gets fresh from his printer turn purple with time, as
>
the ink dry, same for the reds which he says turn orange. I believe this
>
stems from a chemical reaction between the inks and the air.
>
>
I have a strong feeling that's what Steve meant (but I could be wrong).
Why
>
I feel that way is because I also observe the same phenomenon with
dye-based
>
inks when printed on certain media (EPSON 10000, HP 5000, and others too).
>
The cure may rest along the line of what Neil Snape suggested, what you
also
>
suggested above, and Steve found out in the meanwhile -- profile editing.
>
Nevertheless, the hue shift problem is real and ought to be systematically
>
evaluated as part of profiling and inkjet printer. I agree certain will
play
>
that problem down as it is less severe with certain inks/media combination
>
than others but it is still a fact of profiling and injket printer.
>
>
Case in point, HP's new 20ps. I personnaly have not had the chance to test
>
this baby with BEST media (with a BEST Rip neither) as it is too
prohibitive
>
to get in my area ($500 cdn for a roll of Remoteproof 9180 - 24" x 100').
>
But with the exception of the three 'approved' HP media made specifically
>
for this model, all the other inkjet media I have tested with this
dye-based
>
printer exhibit a substantial hue shift as the ink dry on paper. ILFORD
>
Gallerie Classic, for instance, does shift up to 11 Delta over a period of
3
>
days!
>
>
That's bad. And this is not even bringing in fluorescence problem or
>
metamerism issue in the equation.
>
>
For mere mortals like me and others on the list who are lurking, could
>
anyone of you Neil, Bruce or Steve explain in simple words the way you
edit
>
an ouput profile to correct for this hue shift problem?
>
>
If it's not too much to ask.
_______________________________________________
colorsync-users mailing list | email@hidden
Help/Unsubscribe/Archives:
http://www.lists.apple.com/mailman/listinfo/colorsync-users
Do not post admin requests to the list. They will be ignored.