Datacolor User to User Support Group.

I've owned the Printfix Pro Suite (currently updated to Spyder3print v3.5) for several years and created a number of profiles with it for my Epson 2200 and 2400 and all of the profiles have showed strange uneven areas when you view a soft proof of the Granger Rainbow. Epson profiles on the other hand look very smooth.
I just bought an Epson 3800 and decided to give it a go and profile an Innova paper smooth cotton natural white. The profile I got looked like every other profile I've done on the Granger Rainbow:

Yes, our profiles are opitimized for photographic color, not for synthetic color. How they react with out of gamut synthetic colors might matter to people who create vector art, but not typically to photographers.

http://www.ullinish.com/images/GrangerRainbow.jpg

with the strange inconsistences in the cyan area. In practice the profile works very well with out of camera images but if you push the saturation of blue skies it creates weird posterization effects.

If your skies are pushed to the point that you hit the out of gamut cyan range, you may want to reconsider your saturation increases. The other option is to change your rendering intent. I suspect you are using Perceptual or Relative Colorimetric, and will find the situation is improved (and also that your skies require far less saturation increase) using Saturation intent.

Does anyone know why I am getting these artifacts? I have measured most carefully over many many attempts although I have never attempted to average measurement sets.

Its not anything you are doing in building the profile, its likely to be a combination of your expectations, your techniques, and your rendering intent.

C. David Tobie

Global Product Technology Manager

Digital Imaging & Home Theater

CDTobie@...

Datacolor
www.datacolor.com/Spyder3