There are several ways of doing it, but I messed up severely in this method.
The procedure goes as follows: a drawing or sketch is placed beneath a held-in-place clear sheet. Paint is then applied to the clear sheet (starting with the background, ending with the foreground, layer-by-layer). A damp sheet of watercolour paper is then placed on top of the clear sheet (making sure it aligns with the drawing or sketch) and is smoothed out with a brayer. Each layer must dry before the next is printed.
It was supposed to produce, as my teacher said, an impressionist painting effect.
Well, mine looks like garbage, or a bad portrait of Marilyn Manson.
Here is the sketch I made for the project.
Here is the sad, end result.
The problem was that my paint was drying too quickly on the clear sheet, so I applied it in generous amounts. Once the paper was smoothed out on the clear sheet, the paint spread beneath it, hence, the glob-ness of the image.


