Digital BW, The Print

(I guess this might primarily be addressed to Paul, but I'll put it out
here on the forum in case anyone else wants to comment or might be
interested in the comments).
     
     Does anyone have an educated guess as to how long the print life
might be using the new UT or UT2 inks on some of the more popular RC
papers?  I'm thinking maybe Epson Premium Luster Photo paper or maybe
some of the Ilford papers.  I assume it's really just limited to the
paper itself, since the ink is so stable, but I wonder if there might be
other factors involved like how the ink interacts with the specific
composition of the paper.  If HP can make an RC-paper/dye-ink pairing
that lasts 73 years, should we automatically assume the UT carbon inks
will outlast that on any paper choice?

Thanks,
Ed
http://lightandsilver.com