Danny Trejo (Machete) adds a dose of star power to this documentary about ink. This documentary actually focuses on the pioneers of "fine line black and grey tattooing" or as some of us call it "grey scale". More after the jump.

I love the look of grey scale tattoos.  In fact, boy my shoulders and my entire left calf are covered with nothing but grey scale.  There's just something cool about an artist using subtle shades of black and white to bring a tattoo to life.  Danny Trejo himself has one of the most famous and recognizable grey scales anywhere tattooed on his chest.  Take a look at "Tattoo Nation"