Which term describes an early form of photography replaced by the wet-plate process?

• A. Relief printing
• B. Dome
• C. Daguerreotype
• D. Matrix

Answer: (C)

The term refers to an early photographic method that came before negative–positive processes and was later replaced by the wet-plate collodion technique. The daguerreotype, introduced in 1839, produced a sharp, direct positive image on a polished silvered copper plate. It was revolutionary but limited in that each image was a unique positive with no easy way to make multiples. The wet-plate process, developed in the 1850s, used a glass plate coated with collodion and kept wet during exposure, creating a negative that could be reproduced into multiple prints and offering greater sensitivity and practicality for photographing people and scenes. Because of these advantages, the wet-plate method largely supplanted the daguerreotype in professional use. The other terms describe different concepts (relief printing is a printmaking method; a dome is architectural; a matrix is a general term not specific to early photographic forms), so they don’t fit as the early photographic form that was replaced.