I recently bought my first esterbrook, a black lever fill 9550, my first vintage pen. I have flushed and resacked it with a #15 silicone sac as no 16s were available. This was my first resacking. It writes very nicely.
The trouble is that there is a lot of ink collecting on the nib and collector, even when it is stored nib up. Ink fills the valleys of the collector and onto the nib itself. Oddly, it seems to start from the flared sides of the nib rather than the slit or hole, almost as if it flowing round from the underside. I am using diamine jet black which I now know is a 'wet' ink.
Is this a normal part of owning an older pen? Will a drier ink help? Should I consider other means of reducing flow? Could it indicate poor sealing of the sac?
Thanks in advance.