Collodion Wet Plate

Invented in 1851 by Frederick Scoff Archer, an English sculptor.

Frederick Archer created a solution from gun-cotton and silver nitrite called collodion, which was coated onto a glass plates in order to make the plates highly sensitive to light.

These ‘wet glass’ plates created a sharper, more stable and detailed negative than the previous paper negatives.
However, they had to be developed on-site and by the 1880s dry plates became the process of choice for many roving photographers.