This ink is more commonly referred to as Noodler's Bulletproof Black, but the official name is simply Noodler's Black. What can I say, it's arguably the single most popular ink in the US (Heart of Darkness may be a close second). It's not without reason, it's a well-performing ink, behaves great on cheap paper, it's cheap, it's very dark, and it's permanent. You really just can't go wrong.