Green in Black Gradient

Hi,

Whenever I print a Photoshop file on my Canon S9000, with a black gradient, there's always GREEN in the gradient. Although there's no green on the screen. Import into InDesign, same thing. Export to PDF, same thing. Driving me (and my customers NUTS!). Any suggestions?

The images are 300 dpi, RGB. CMYK does the same thing. I shot some jewelry on a solid black tile, looks great on screen. Prints with LOTS of green in the shadows.

I'm stumped!

In article <020520051006020909%>,
Sternodox wrote:

The images are 300 dpi, RGB. CMYK does the same thing. I shot some jewelry on a solid black tile, looks great on screen. Prints with LOTS of green in the shadows.

Your monitor or printer profile is not correct.

It is actually very difficult for an inkjet printer to produce a true neutral gray with all four inks; it does not print the black parts of a color image using only black inks.

You will need to use a different color profile for your printer. A good place to start might be by reading the chapter on color management in the Photoshop manual.

--
Art, photography, shareware, polyamory, literature, kink: all at http://www.xeromag.com/franklin.html

Sternodox wrote:

Hi,

Whenever I print a Photoshop file on my Canon S9000, with a black gradient, there's always GREEN in the gradient. Although there's no green on the screen. Import into InDesign, same thing. Export to PDF, same thing. Driving me (and my customers NUTS!). Any suggestions?
The images are 300 dpi, RGB. CMYK does the same thing. I shot some jewelry on a solid black tile, looks great on screen. Prints with LOTS of green in the shadows.

I'm stumped!

What does navigator say about the RGB values in the gray areas of the gradient? Are the values about equal? Is the gradient in RGB or gray-scale? If RGB, convert to gray-scale and back to RGB to remove all possible color from the image.

Also, open Curves, select the middle eye-dropper, and use it to click on a middle gray area, which will equalize the RGB values where the dropper is. This ensures that the image is neutral gray, independent of the monitor calibration, and then print the image. If the green persists, then your printer profile is wrong for the paper you are using.

I presume you are using proprietary inks? Third-party inks can produce casts due to dye density and viscosity variations.

Finally, take the image to a Frontier lab and request a print 'as is' from the file, no changes. The result will tell you whether the file is wrong, or your printer is wrong.

Colin