I have posted a "first look" at a fade test that just completed its first 8-week run. A PDF discussing the test is at http://www.paulroark.com/BW-Info/Fade-Test-8-week.pdf . A scan of the tested and control (dark storage) print samples is at http://www.paulroark.com/BW-Info/8Wk-fade-4-20-2015-100ppi-8bit.jpg .
My initial and basic conclusions at this point are that the new Eboni v. 1.1 is as solid a carbon ink as the old Eboni. The blue toner I mix using Epson Cyan and Canon Blue performed essentially as expected. So, I intend to continue to develop primarily carbon inksets along the lines of the 1400/1430 http://www.paulroark.com/BW-Info/Eboni-Variable-Tone.pdf and 7800 http://www.paulroark.com/BW-Info/7800-Carbon-Variable-Tone-2015.pdf . The 3880 is the next in line for a variant of this inkset approach.
The print samples will start their second 8-week session in the near future.
All feedback welcomed.
As flawed as the fade test may be, it's at least a data point where I had no other.
Paul