Jisho

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Noun
1. dry plate (photography)See also 乾板
Wikipedia definition
2. Photographic platePhotographic plates preceded photographic film as a target medium in photography. A light-sensitive emulsion of silver salts was applied to a glass plate. This form of photographic material largely faded from the consumer market in the early years of the 20th century, as more convenient and less fragile films were introduced.
Read “Photographic plate” on English Wikipedia
Read “写真乾板” on Japanese Wikipedia
Read “Photographic plate” on DBpedia

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