What is the best Tattoo Ink in the US?

This is a question that is more of a matter of personal opinion than anything, but the most highly regarded and most used inks on the market are Eternal Ink, Intenze Ink, as well as Star Brite Ink and Kuro Sumi Ink. There are a lot of inks on the market that are of poorer quality and don't go in so well or stay bright over time, but if your artist uses one of the aforementioned inks, you should not have any problems such as this.