White Hole worked OK for me in an EF Jinhao Shark (which can be a fairly wet writer)
It absolutely hated my dip pen, but I didn't have the Hocoro ink reservoir thing last year.
https://masto.ai/@jimp/113687738866932128
nostr:note16dehrpcjvu9nf26fm0s6sw9dscpak58vcyf7ksh035lv3mqz54eq5xell0