phototype

/ˈfoʊtoʊˌtaɪp/
noun
  1. A photographic image or print used as a template or model for reproduction, especially in printing.
    • The designer created a phototype of the new book cover to check the colors before printing.
    • In the old days, newspapers used a phototype to transfer images onto printing plates.
    • The artist made a phototype of her drawing to produce multiple copies for the exhibition.