This is seriously a technique I haven't seen yet, hence I find this work really original and I have to say it's also intriguing for the eyes, as the eyes can't really get bored with all those lines, you can actually get lost by following them! The brown tones you picked for the background are wonderfully chosen as they don't distract the eye, all the attention goes to the black lines and all their knot they creates. The pose is unusual and and I really find interesting the amount of lines you decided to use for creating the nose. Usually people tend to spend more time to create the eyes while in here it almost seems you wanted to give more attention to the nose and lips. The hair is well made too, it's almost as if you draw each hair one by one! I'm sure the process to create this work took quite a lot of time, but I think it was time well spent.