Starting from the classical technique – which consists in reproducing an object by placing a sheet of paper over it and rubbing this with a color medium to make the form appear – Rotella processes a particular version of it sprinkling a nitrate solvent onto the pages taken from magazines and transferring the image obtained to a sheet of white paper. The tone of color of the starting images undergoes a sophisticated and controlled depletion. Not infrequently Rotella was used to compose several images onto the same medium.