What is the best household ink for tattoos?

Honestly man,
There is NO "best" household ink, as a tattoo artist, i would suggest only either getting a professional tattoo or get a friend with a kit (and professional ink) to do it, the reason being, most inks and dyes you can buy that you might think sound suitable (even non-toxic inks), can actually give you blood poisoning/staph infection, just to name a couple of illnesses that may occur, tattoo inks are usually either water,plastic, or metal based, even these pro inks may cause allergic reactions and skin problems, so use good judgment and reasoning when thinking about tattoos, remember, your body is your temple, so treat it with respect!!!

Have fun and good luck