Digital BW, The Print

> My own tests give me doubts about pigments.  I have a Septone print
> (multi-tone gray scale inks) on my windowsill that began showing signs
> of fading at 125 days.  Right beside it is an Eboni BO print (both on
> PhotoRag) that is over 150 days now with no signs of fading.   Of
> course that's an unfair torture test (bright daylight and a small
> amount of direct sunlight every day), but it nevertheless shows a
> difference in the inks.  I plan to do a windowsill test on a UT7 print
> when it's available.

That's a bit scary -- a Septone print showing signs of fading at 125 days?  
(Yes, I understand that,  as you said, this is not the kind of test that simulates 
"real world" conditions, but geez...).  Could you define exactly what signs of 
fading you're seeing?  A general fade in density of the whole image?  Blacks 
getting weaker?