Following the last 14 types of peak grip parts,
I also started developing the Ultem grip section (ebonite feeder compatible).
Because of limited materials this time,
I will limit the types to less than 10.
The grip part below is unpolished.
This is how it looks like without ink.
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Below is what it looks like after it's filled.
I think the internal appearance will change over time,
but this is roughly how it is.
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Since Ultem is semi transparent after machined,
For the first time in my fountain pen research,
I observed the ebonite feed flow.
It was very fascinating.