I'm not sure how this is supposed to work. I mean, a black hole is a gravity gradient at the point where it's 'too steep' for light to escape, isn't it? How does this correlate with density? I mean, I understand that, the denser something is, the steeper it's gravity field but wouldn't expanding it's radius result in a less steep gravity slope and then you wouldn't have a singularity/Schwartzchild Radius?