How to Fill a Fountain Pen, Part IV: Eyedropper Fountain Pens

In our new series, "Fountain Pen Basics," I discuss topics of interest to those new to fountain pens, such as how to fill a fountain pen, how to clean a fountain pen, and related tips and tricks. In Part III of this series on how to fill fountain pens, I look at two different style of eyedropper fountain pens: (1) a Japanese-style eyedropper featuring a valve system designed to prevent leakage and minimize burping, especially as the pen gets low on ink and the heat from your hand causes the ink/air to expand; and (2) a standard Franklin-Christoph cartridge-converter fountain pen that I convert to an eyedropper using readily available silicon grease.
For further reading on these topics, please check out the following posts on our primary website:
1. To Eyedropper or Not to Eyedropper, That is the Question: www.gentlemanstationer.com/bl...
2. Swapping Fountain Pen Nibs: From Easy to Expert: www.gentlemanstationer.com/bl...
The pens featured in this post can be acquired at the following sites (including our own). None of the third-party links are paid advertisements or product placements:
1. Opus 88 Fountain Pens: www.gentlemanstationer.com/th...
2. Franklin-Christoph Model 66 Stabilis Fountain Pen: www.franklin-christoph.com/co...
3. J. Herbin Poussiere de Lune Fountain Pen Ink: www.gentlemanstationer.com/cu...
4. Pilot Iroshizuku Fountain Pen Ink: www.gentlemanstationer.com/cu...
5. Silicon Grease: andersonpens.com/pure-silicon...
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[@taturpin]

I’m really enjoying your videos. Thank you! BTW, you said 10 oz. bottle, but it looks like 10 ml.

[@TheGentlemanStationer]

Thanks so much! Yes, it's ml. They do make a couple of larger bottles, but I'm not sure there's one that's that large!