👉 The term "isophone" refers to a type of phonograph disc that was manufactured in Japan during the 1920s and 1930s. Isopones were designed for use with the Kodak 8x12 film format, which allowed the creation of large-scale prints of photographs or illustrations. They featured an adjustable surface that allowed for the adjustment of brightness and contrast, making them ideal for creating complex images in a single print. Isopones were popular
