Picosure for black ink. How many treatments would removal with Picosure typically take on such a tattoo?

It sounds like Picosure will be a good choice for removal of my black tattoo. It's a simple design, with no color and no fill. How many treatments would removal with Picosure typically take on such a tattoo? Are results instant beginning after the first treatment, or do they show up gradually in time? If so, how long? Thank you in advance! ~ Cera