In class I have been reviewing the bones of the human body. I had to draw the arm and hand of the human skeleton using ink and an even line weight. All the lines have the same weight but to create depth I put the times inside closer together.
In the thiscolossal article there are colorful sketches of hands and faces. Each sketch is made with a variety of colors, but these colors are not used for shading. The colors are all lines that are filling the inside of the hands and faces. Most of the detail that is given to the faces are shown through the colored lines. The colors in the faces and hands also help to make other parts emphasized.