A duo-chrome is a technique of using oil washes of varying opacity to draw an image out of evenly speckled toned paper. The term duo-chrome is derived from the fact that two separate colours, one for the lights and one for the shadows, are used in the process. The dark is mixed to match the darkest tone on the paper while in turn, the light is mixed to match the lightest. The end result is the creation of a mild tension between paper and form. Round, but yet still belonging to the paper.