Recommended Black for Tribal Anyone?

Hey- Been working on a piece that was already done on my client (he is adding to the original work) and it is a large tribal piece...problem is this kid's skin is the hardest skin I have ever worked on-his last tattoo artist commented on how tough it was to get ink into him (and NO he was NOT a scratcher-viable tattoo biz in Milford CT) Right now I am using Millenium Ink which is ok, but I find the black is not as black as I would like it to be- I just recently ordered Starbrite Black Outliner and was looking into the one pass tribal ink...I have another client scheduled for a session and she lives in St. Vincent's so I need a black that is going to be able to stand up to the challenge. Any recommendations would be apprieciated. Thanks!

im a big kuro sumi fan although i have used star brite tribal it was a very good ink i would recomened either kuro or starbrite tribal intense is a great ink also havent used it for tribal just lining but good ink none the less. as far as skin being tough sounds like the client may be a sun worshiper or works outside alot.

get some ONE from kingpin supply....the bestest

agreed with ONE ive talked to another artist and gave great review on it said it was very good ink

Thanks! I tried to go on Kingpin's website last night to order for whatever reason it wasn't running-which is weird since I have ordered from them before...anyways I did find ONE somewhere else and ordered it. Thanks for the suggestions! My St. Vincent client is coming in next week so I should have it by then...