The main objective of cleaning is to achieve clarity of surface detail.[47] Books and documents may be subjected to different types of cleaning. Conservators may clean dust from paper and leather with a soft brush or cloths, a specialized vacuum cleaner, nonchemical vulcanized rubber sponges, or nonabrasive erasing materials such as vinyl erasers.[1][2] In order to remove mold and insects, conservators use scalpels, aspirators, or specialized vacuum cleaners.