the pen doesnt necessarily need to absorb the ink, the ink just needs to dry on the surface is such a way that it adheres well enough it doesn’t rub off, or stay wet.
So really, you want a high adhesion, quick drying ink, which would basically let you write on any surface it’ll stick to.
Carl@hexbear.net 10 months ago
idk how it works but it does. I’ve been using Rite in the Rain for years but there are others too if you search it up.
EpeeGnome@lemm.ee 10 months ago
Just guessing here but I imagine the ink doesn’t contain any water, so an otherwise absorbent material that is treated with a hydrophobic coating would probably work for that.