Digital BW, The Print

Just wondering what the latest info is on fade resistance of MIS UT7
inks, especially versus Piezography. 

I couldn't find an answer on the Wilhelm Web site (man, what a mess!),
and the info on the MIS Web site hasn't been updated since 2004 (!). 

The Cone Web site claims Piezography inks outperform MIS-FS (warm
neutral) inks. But their test report doesn't say when the test was
done, or why other MIS inks such as UT7 weren't tested.