A new exhibition at the National Portrait Gallery traces three different 1800s forms of photo-making: daguerreotypes, ambrotypes and tintypes Kaila Philo Photography is an art that often gets taken ...
The ambrotype, a photographic process invented in the 1850s, took its name from the Greek for “immortal” or “imperishable.” An underdeveloped positive on coated glass, the ambrotype image assumed full ...
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