1 янв 1850 г. - Ambrotype

Описание:

The ambrotype was based on the wet plate collodion process invented by Frederick Scott Archer. Ambrotypes were deliberately underexposed negatives made by that process and optimized for viewing as positives instead. In the US, ambrotypes first came into use in the early 1850s. Popular from the 50's-60's.
source:
https://en.wikipedia.org/wiki/Ambrotype

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