Answer:
wet collodian process
Explanation:
According to my research on early photographic methods, I can say that based on the information provided within the question the term being mentioned is called the wet collodian process. This is a photographing technique invented in 1851 by Frederick Scott Archer, that requires the photographic material to be coated, sensitized, exposed and developed within the span of about fifteen minutes, necessitating a portable darkroom for use in the field.
I hope this answered your question. If you have any more questions feel free to ask away at Brainly.