"In Japan, bromide (ブロマイド, buromaido), or promide (プロマイド, puromaido) refers to a category of commercial photographic portraits of celebrities including geisha, singers, actors and actresses of both stage and film, and sports stars. The use of the term "bromide" or "promide" occurs regardless of whether bromide paper was actually used for the photograph.
In 1921 the Marubell Company began marketing photographs of celebrities under the name "Promide". The first of these was a portrait of the film actress Sumiko Kurishima. Marubell sold the photographic paper as "bromide", and its finished photographs as "Promide". The two words eventually became synonymous and between the mid-1940s and the late-1980s sales of "bromides" were used to measure the popularity of Japanese idols. Sales records were released on a monthly basis for the following categories: "Male Singers", "Female Singers", "Actors", and "Actresses"." - (en.wikipedia.org 11.12.2019)
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