A kinetic infrared scanning densitometer was used to study lithographic development in real-time. The instrument proved very effective after several slight improvements to increase sensitivity and obtain Density vs Time of Development curves directly- It was noted that this apparatus could also be used lot a study of the penetration of solutions into an emulsion. An exposure series on a normal Kodalith system indicates a decrease in induction time and an increase in maximum rate (up to diffusion limit) with increasing exposure. A series of sulfite concentrations shows that the lith effect becomes detectable only below a sulfite concentration of approximately 8 g/l in this system. A low sulfite developer with no formaldehyde showed that D max was highly dependent on exposure and developer exhaustion. Complete elimination of formaldehyde from the lith developer caused some unexplained effects.
Library of Congress Subject Headings
Photography--Developing and developers; Photographic sensitometry
Department, Program, or Center
School of Photographic Arts and Sciences (CIAS)
Carroll, B. H.
Turbide, David and Williams, Michael, "A Study of the Kinetics of "Lith" Development" (1972). Thesis. Rochester Institute of Technology. Accessed from
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