The monotype is printed from metal, plastic or a glass plate which the artist painted. The artist may also use paper, twigs, and any other material to transfer an image to the paper. Why do this rather than paint directly on the paper? Because of the special effect one gets with color and luminosity in this process. This is more obvious on the 2nd. Or 3rd. pull of the print. The artist may choose to work into the plate or paper to get a finished piece of art. Oil, ink or paint is usually used in print making but artists also use watercolor for different effects. The word monotype applies because you get only one print from the painting image although one may get 3 pulls each one will be different. Printing may be done by hand or using an etching press. Adding ink to the plate or taking it away to create an image.