The printmaker is demonstrating protecting one color on the print with a mylar mask, cut to shape, that will protect part of the print from an application of another color on another pass through the press. It is very interesting to think about making art: what shapes and colors things will be, and can you make them that way? I look at photographs and see the way the light comes through a window and creates the shapes around objects in the room. There aren;t enough hours in the day to see everything you want to think about. Good night.