Speaking of paper,
@crashthegrey you were right -- those notebooks I have are Tomoe River 68gsm.
My golly is that good paper!
I took my wettest pen (an FPR flex nib, which pours out ink when you press fully), and compared several different fountain pen papers.
The 2nd best was Rhodia's "R Premium" 90gsm (most of their paper is 80gsm and noticeably inferior).
Turns out this is actually a Clairefontaine product.
It's very good -- less feathering than most other fountain pen papers.
But the winner by a mile was the Tomoe River 68gsm.
Oh. My.
It simply refused to feather, no matter how much excessive ink I intentionally pooled from that crazy flex nib.
Why has this gone the way of the Dodo?
Will it ever come back?
Is there anything else like it in the world?