Digital BW, The Print

>
> I am temporarily using a Photosmart 7760 while I wait for a new R220.
>  Yesterday I was able to print perfectly neutral BW images, but
> something has gone terribly wrong.  Today every time I try to print BW
> I get this incredibly warm toned result.  I switched to the U.S.
> Prepress Defaults setting in Photoshop that Clayton Jones recommends,
> and have the Print Space Profile set to "Same as Source" in the print
> preview window.  Nothing seems to make any difference.  The 7760 has
> both the TriColor and PhotoGray carts installed.  I thought perhaps
> that something had gone wrong with the TriColor cart, but I just made
> a perfect color print using the same carts.  I'm at a loss to
> understand how I was able to print neutral BW yesterday, and can't
> come close today.  What went wrong?
> 
> Rem
>


I'm almost embarrased to admit this, but the problem ended up being
the paper!  I had been printing with Kodak paper, with totally neutral
results.  Yesterday I bought a box of Kirkland Professional Glossy at
Costco.  The prints using this paper were distinctly warm compared to
the Kodak paper.  The difference was so dramatic that I assumed that
something had gone wrong with either my Photoshop setup, or with the
printer.  As a newbie I am a little surprised by all of this---that
there would be such a difference inherent in the papers themselves.  I
certainly can see how color settings, driver settings, and the carts
themselves could make a difference in the print outcome.  I wasn't
counting on the paper being the culprit.

Rem