Physical development of photographic plates is not as efficient as chemical development. While it produces very fine grain negatives, longer exposure than normal is required and plates must be developed an hour to produce satisfactory printing densities. pH of the developer is important.
Proceedings of the Iowa Academy of Science
©1937 Iowa Academy of Science, Inc.
"Physical Development of Photographic Plates,"
Proceedings of the Iowa Academy of Science, 44(1), 149-149.
Available at: https://scholarworks.uni.edu/pias/vol44/iss1/50