I filled a Sheaffer Crest Vac-Fill with Montblanc Irish Green, and have written maybe 15-pages-worth of ink from that fill. This ink has been creeping over the entire nib. I wipe the nib clean, re-cap and set the pen in my rack (nib up), and within the hour the ink is back over the outer surface of the conical nib, top and bottom. I've never had such a persistent example of creep.
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