Digital BW, The Print

I have a series of large prints on EAM made with the new Warm-Tone 
Piezotones on a 7000 using ImagePrint 4.  They were printed 2 months ago, 
and since they were meant as proofs,  I clipped them up on the walls 
unframed. The room they have been hanging gets no direct sun but has 
plenty of daylight from a southern window.

I was gone for a few weeks and when I returned a few days ago I noticed to 
my great dismay that the black and near-black areas had turned brown. Since 
that is also a lighter value than the original black, these areas now appear 
"solarized" or "bronzed out". IOW, the brown appears within a clear contour 
from the surrounding image which is not affected.  

I am guessing these are the areas where the black ink kicks in. So, I have 
many questions and theories, but no answers. Maybe we can compare notes?

- Is this happening only on Epson Archival Matte (and the recently renamed 
version)? Any other papers? Does it happen behind glass?

- Is this what Paul Roark predicted about PT black - except this happened in  
(a short) real time and real world  conditions rather than a fader? Pretty scary.

- If the above is a paper-wide symptom, InkjetMall needs to recall the black PT 
ink (which is common to all sets) and refund or replace with a known stable 
ink such as MIS. 

- Since InkjetMall no longer supports their inks with profiles and software, we 
need to alert Colorbyte and R9 to the need for strange new combinations of 
inks such as PT grays with MIS FS black or MIS DD. I realize this is already 
an old idea on this list, but I thought it applied to cases that need "extreme" 
archival stability. I didn't think the Piezotones wouldn't even last 2 months!! 
And to think they were originally hyped up as pure pigment! 

Any thoughts?


Antonis