I've read that plumbers silicon grease is Not 100% pure. And 100% pure is what is wanted.
Dive shops.....I've not found any in camera shops. Used where food is prepared also.
A tiny bit last normal Pelikan, Geha, or other twist out nibbed piston pens for years....if you are not repairing.
When making cork seals after boiling the cork in paraffin&bees wax, smearing 100% pure silicon grease on is good to go. Paraffin is a British thicker mineral oil.
Do not use cheap O rings in the pens are not made to be pulled apart every year to regrease the O ring. Unless it's an Ahab or Twisbi.
Edited by Bo Bo Olson, 15 February 2017 - 01:01.
German vintage '50-70 semi-flex stubs and those in oblique give the real thing in On Demand line variation. Modern Oblique is a waste of money for a shadow of line variation. Being too lazy to Hunt for affordable vintage oblique pens, lets you 'hunt' for line variation instead of having it.
www.nibs.com/blog/nibster-writes/nibs-germany & https://www.peter-bo...cts/nib-systems,
The cheapest lessons are from those who learned expensive lessons. Ignorance is best for learning expensive lessons.