Collagraphy is a process in which materials are applied to a rigid substrate such as mount board or wood. Ink or pigment is applied to the resulting collage and the board is used to print onto paper or other substrates using either a printing press or hand burnishing. The resulting print is termed a collagraph.
Substances such as carborundum, acrylic mediums, sandpapers, bubble wrap, string, card and natural objects can all be used in creating the collagraph plate.
Collagraphy is a very open and experimental printmaking method.