Originally posted by taurus9 It's a grayscale photo so I think the file is set right. From what I have heard, the printer's B&W color cast is from the printer which tries to emulate gray scales by combining the various ink colors. It is pretty close, but there is a slight color cast to the grayscales. I think there are printers out there with gray inks but I could be wrong...
When you open the file and look at the mode does it say "Grayscale" ? Or did you just desaturate the color. "Grayscale" forces the printer (most anyway) to only run black in. Gray, any shade of any of the four colors actually, is only an illusion. The printer either prints 100% of the color or prints 0% of the color. There is no middle ground. What varies is the size of the dot.
Just desaturating the image causes the printer to try to make the grays using all four colors. One other thought. Is it a CMYK printer or a MYK printer. My dell only prints 3 color. No black so it's always a color build.