jan 1, 1854 - Ambrotype
Description:
Ambrotypes are negative photos on glass plates. When black paper is placed behind the glass, the image appears to be a positive print. The sensitizing agent was silver nitrate, the developing agent was pyrogallic acid.Invented in England by Frederick Scott, the ambrotype was introduced in America in 1854 and last made in 1865.
Added to timeline:
Date:
jan 1, 1854
Now
~ 172 years ago