Hi - this is my first post here but I've been reading for a few months. I'm looking for a dark ink for writing medical records (on a variety of paper qualities); I'd prefer something not pure black, just to be a bit different (everyone uses black ballpoints but the technical requirement is "black or other approved colour" - whatever that means!). I've been using Sailor Sei-Boku which is fairly nice but I'd prefer something a bit nearer to black. Either blue-black, or possibly green-black. I've tried Noodlers Prime of the Commons and don't really like that colour too much. I use a Lamy 2000 EF and I'm awaiting delivery of a Sailor Pro Gear Fine. The ink doesn't need to be "paper under a tap" waterproof but it does need to cope with someone washing their hands near the open page in the medical notes and some water droplets accidentally falling on the page. Any suggestions? Many thanks, Jonathan.