Datacolor User to User Support Group.

On Mar 25, 2008, at 12:37 PM, Richard Svensson wrote:
> Hello,
>
> I bought a Spyder3Print to make some custom profiles for our HP
> DesignJets.
> Used the 729 patch and extented greys targets.
>
> The profiles make saturated blues to render as quite purplish
> and inspecting the generated ICC's on ColorSync Utility show that the
> gamut is quite small.
>
>

That usually means that the targets weren't printed correctly,
with color management disabled. Weakly printed targets
(with color management turned on) produces a small gamut in the
resulting profile.

Can you send the measurement files to me at davem@...
so I can have a look? Use the File:Open Data command to open the
folder that contains them.
> Additionally, only after doing lengthy manual adjustments I'm able to
> produce
> truly neutral greys with overall pleasing colors.
>
>

Bad target prints, and/or bad measurements. You should never have
to do lengthy manual adjustments to build a good profile.
>
> I have also a XRite spectro at my disposal, and none of the
> profiles generated with that piece of hardware/software caused
> such weird color casts. Also XRite generated ICC's
> show considerably larger and smoother gamut.
>
>
Something tells me that those targets were printed correctly. I'm
assuming that you did RGB profiles (not CMYK) using both packages?
How did you print the XRite targets when you built profiles that way?
> I like the versatility of Spyder3Print spectro and the controls/fine
> tuning the Spyder3print software allows. Would like to continue  
> using it.
>
> I have:
> - Always calibrated the spectro using the tile in the holder
> - D65 complying working space for visual inspection/comparison
> - Visually inspected the printed targets for each media (the blues
> are in there)
> - Measured A2-size targets for each media two times - in "Measured"  
> mode
> - Carefully looked for any inconsistencies in the measurements
>
> Anybody gotta clue why I'm getting such erroneous profiles?
>
>
Have you watched the videos yet? Those will also give you plenty of  
clues:

http://spyder.datacolor.com/learn_videos.php
> And is it typical that even after 729 patch + grey patch targets the
> neutral greys -- and skintones for example -- have quite considerable
> colour cast?
>
> Am I missing something obvious?
>
>
>

Lots, I think...!


David Miller
Senior Software Developer, Digital Color Solutions
Datacolor