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![Government discovers method to preserve [...] (3) Test for fading. D. Levinsky of the Bureau of Standards is pictured exposing a developed film to light from a carbon arc to find whether the photographic image fades. The carbon-arc light simulates daylight closely and therefore is used for many materials as a standard source of illumination for this purpose, 7/8/38](https://cache.getarchive.net/Prod/thumb/cdn4/L3Bob3RvLzIwMTUvMTEvMjUvZ292ZXJubWVudC1kaXNjb3ZlcnMtbWV0aG9kLXRvLXByZXNlcnZlLTMtdGVzdC1mb3ItZmFkaW5nLWQtbGV2aW5za3ktb2YtdGhlLTY0MC5qcGc%3D/40/32/webp "Government discovers method to preserve [...] (3) Test for fading. D. Levinsky of the Bureau of Standards is pictured exposing a developed film to light from a carbon arc to find whether the photographic image fades. The carbon-arc light simulates daylight closely and therefore is used for many materials as a standard source of illumination for this purpose, 7/8/38")
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Резюме
Public domain photograph of 1930s industry, war production in the United States free to use, no copyright restrictions image - Picryl description
Теги
Дата
01/01/1942
Авторы
Palmer, Alfred T., photographer
United States. Office for Emergency Management.
Месторасположение
Detroit (Mich.), 42.33139, -83.04583
Источник
Library of Congress
Ссылка
Информация о правах
Public Domain
