Advice on brown and grey ink

[Analogriter]

FYI, I updated my post above with pics of Diamine Macassar on that made in Egypt notebook I mentioned. Here are some other pen/ink tests on the same.





If this were a bit heavier paper it would probably have zero show through.

Prices for Clairefontaine notebooks aren't too bad but pretty sure there are less expensive options too.

Thanks, this is very helpful.