Datacolor User to User Support Group.

On Aug 17, 2008, at 8:22 PM, i_3d_c wrote:

>
> I've printed out the 729 patch chart from my Epson 1400 onto
> Hahnemuhle Fine Art Pearl. For some reason, one patch consistently and
> completely different from the printed patch. Sheet 3, row 14, column
> A, is a pretty strong yellow yet reads as blue!
>
>
>

The first thing to check is this: is your calibration tile
dirty? (What follows applies to measuring the pure yellow
patch, as well as paper white). From David Tobie's tech note:

****

Care of the Spyder3Print Calibration Tile

The white tile embedded in the base of the Spyder3Print or
PrintFIX PRO spectro needs to be clean in order to function
properly. It can be cleaned with lens cloth or a paper towel.
Avoid using rags or other non-lens cloth, as it may contain
optical brighteners, which could effect white tile measurements.
Mild cleaning solvents such as Windex or Isopropyl Alcohol can
be used as needed.

Remember your mother telling you to wipe your feet before you came
into the house? Its the same with your spectro’s white tile: as you
move it across printed targets, it can pick up ink and other residues.
If you clean the tip of the spectro before calibration, that will keep
these materials from getting on the white tile, and make keeping the
white tile clean a much simpler process.

How do you know your white tile is dirty? A visual inspection can
tell you a lot. Another indication is if your measured values for
paper white on optically brightened papers show as a bright Cyan,
instead of white. If this occurs, clean both your spectro tip, and
your white tile thoroughly, recalibrate the spectro, and reread paper
white. If that fails to solve the issue, contact our technical support,
for further information.

****

If this doesn't solve things for you: let us know, and we'll handle
this through a support ticket.


David Miller
Senior Software Developer, Digital Color Solutions
Datacolor