I have this and haven't used it yet. Can you believe it?Tarte's Clay Paint Liner is really black, IMO.
truth! Anastasia's is a good one too.Inglot AMC Liner 77! blackest liner i've tried
I found the out about the Milani liquid liner the hard way. Dried out fast as heck because the top wouldn't stay on. And the tip was only good for a couple of weeks.Urban Decays seems to be the blackest I've tested but it's always dried up in the display case so that has turned me off to it... I've run into ashy looking black liners in my experience so I've been using L'oreal liquid liner pencil in Carbon Black and it has never let me down... Stay away from the Milani one though, it's not very good quality sadly...
Gucci has a new gel liner it's super black and does not budge once it sets.