The name Photorealism (also known as Hyperrealism or Superrealism) was coined in reference to those artists whose work depended heavily on photographs, which they often projected onto canvas allowing images to be replicated with precision and accuracy. The exactness was often aided further by the use of an airbrush, which was originally designed to retouch photographs. The movement came about within the same period and context as Conceptual art, Pop Art, and Minimalism and expressed a strong interest in realism in art, over that of idealism and abstraction. Flourishing during the 1970s, Photorealism engages the Marxist critic Walter Benjamin's influential treatise, "The Work of Art in the Age of Mechanical Reproduction," (1936) which attempts to position art within the sphere of mass media. Among several male practitioners of Photorealism there is an interest in themes of machinery and objects of industry such as trucks, motorcycles, cars, and even gumball machines, whereas Audrey Flack, the sole female practitioner, infuses her works with greater emotionality and the transience of life.