A Japasnese user posed a queston at a Japanese fountain pen site whether or not new Montblanc Blue/Black ink has been changed its color and
ingrediens, He felt that the ink had become less "permanent" recently than the past one (or more "washable" in a sense). He also found that the
recent Blue/Blank ink bled through Moleskins papers, while the old B/B ink had done much less likely.

Have you noticed such change?