Datacolor User to User Support Group.

On Dec 8, 2007, at 11:24 AM, WhoCares wrote:

> Hi All,
>
> An apology in advance if the topic has already been discussed or if  
> the bug is known.
>
> Seems the PrintFix Pro 2.1 (Library 1.68) I have installed build  
> identical profiles irrespective
> of the corrections applied. I am talking about succession of several  
> profiles based on the
> same measurement.
>
That's right. If you build 5 profiles in a row, from the same set of  
measurements;
and if you haven't changed any of the sliders; all 5 of those profiles  
will be the same.
> Of course the printer print the file absolutely the same.
>
(see above: if so, no slider adjustments? then yes, the prints will be  
the same)

If you repeatedly adjusted the sliders; built a new profile; did a  
test print;
went back and built another profile; did a test print; etc. then either:

- You're not actually printing through the PFP profile (mistake in how  
you're hooking
it up inside Photoshop), or...

- PFP isn't building new profiles, because you're using the same  
profile name, and
Photoshop (if you haven't quit from it; and if it still has the  
profile "open" inside
itself) isn't letting PFP overwrite the profile. You should be getting  
a warning in
PFP if this is the case.
> Having realised
> this I opened ColorSync and checked the profiles build over several  
> days in an attempt to
> correct colour cast. Those build during the same day are absolutely  
> identical!
>
If you didn't change the sliders, then the profiles will be identical.

If you did change the sliders, then the profiles will differ from each  
other.

If you think that they DON'T differ, then it's because you're not  
looking at the profiles
correctly to determine how they differ. You're not going to be able to  
easily see a difference
if you look at the gamut shape in a utility like ColorSync utility.
> The only
> difference is when PrintFix is quit and restarted again. Then the  
> first build profile reflect the
> corrective changes. Each new profile build with different  
> corrections is actually build with no
> changes applied.
>
>
Not true; the changes are there; you're just not looking for them  
correctly.
> Is there any solution for this problem?
>
It's going to be difficult trying to see these changes without actually
doing prints.

You can use Convert to Profile to apply the profile directly to an  
image in Photoshop,
but if you're not skilled, you're not going to know how to interpret  
what you see. (There
are several steps involved in discussing this procedure, which I won't  
get into here).

Your best solution for actually seeing the differences in the profiles  
you build, from
doing adjustments with the sliders, is probably this: (built directly  
into PFP...!)

- Build a profile with sliders all set to 0 (or whatever you like);  
name it whatever
you like, since this will only be a test; then print a test image  
through the profile
after you're done, onto 1/4 corner of the page.

- Step backwards in the UI, make a large change to one of the sliders  
(maybe brightness),
rebuild the profile into the same name (again, this is just a test),  
put the paper
back through the printer and now print a test onto a different corner  
of the paper.
You'll see easily enough that the prints are different; because the  
slider adjustments
worked when you built the profile.

- If you build profile that are named differently, with slider  
adjustments coded into
the names, you can select them individually in an application like  
Photoshop and
print through each of the variations; and  yes, your prints will be  
different.


Best regards,

David Miller
Senior Software Developer, Digital Color Solutions
Colorvision