I am not quite sure if its metamerism to. I will try to decribe it:
The cast is Green, appears only in neutral B&W prints. Not visible or noticable in Color Prints.
I think the Print looks good under daylight, i am not 100% sure. My eyes easilly can fooled knowing the print is Green.
The cast is Heavy Green under Fluorescent or incandescent.
When i spot measure parts of the print with the spectro, returns perfect neutral measurements.
No RIP just the Canon Pixma Driver, EyeOne, Profilemaker 5, RGB Profile.
The mystery is when i build multiple versions of the profile in different temperatures, from 2000K up to 9000K, all of them return the same Green Cast. In 9000K range the cast is a bit less noticeable.
I have measured the light in the room using EyeOne light head, its about 3500K. I build a profile with 3500K, and still the cast is there!
If anyone cares to examine spectral measurement file or the ICC profile, i will be happy to send them.
Grays are sometimes tough especially when you have to run through an RGB print driver.
Does the green cast show up when you soft proof the image on your monitor or is it only there after it prints?
That would make me think something’s up with the spectrophotometer calibration.
I assume your calibration pad on your Eye One is clean.
If you’re spectro is feeding bad data into Profile Maker then you’re certainly well aware of the outcome of that.
However, it could be the behavior of the inks. It kinda sounds like metamerism. Have you had success with this in the past?
Let’s see … if the profile is printing greenish, then it’s overcompensating due to the spectro reading too much magenta, right?
You have probably done this already but:
Measure a Kodak gray card and also measure the white side of the card (or even a white sheet of paper).
See what the Lab* values read. Do they lend themselves towards red?
Good luck getting this worked out.
I’m about to buy either a Canon or Epson printer myself. I use big VuTeks right now so my knowledge of printing through RGB drivers is minimal. I’ll be watching this thread with interest as I want to print black & white images on my new printer, too.
The Photo Rag does contain optical brighteners - and it should (in my experience) trigger the “Correct for Optical Brightener” option in PM Pro.
There is the possibility (and I even venture to say, probability) that your issue is related to either the testchart being printed without all color-management (CM) turned off (this includes both PhotoShop color-management settings as well as Canon Pixma CM settings), or the custom profile is not being properly applied due to incorrectly applied CM settings in PhotoShop and/or Canon Pixma print driver.
Printing out of a graphics application using an OEM printer driver often complicates the task of setting up an error-free CM workflow.