The tone reproduction curve of small-scale images on KODALITH film developed with KODALITH Super Developer were obtained by microdensitometry using a sinusoidal target of 64 percent modulation as a sensitometric tablet to produce images at spatial frequencies corresponding to screen rulings of 9 to 375 lines/inch. A similar series of exposures was processed with addition of sulfite to the developer to give essentially noninfectious development. Speed and contrast with KODALITH developer increased with spatial frequency; speed increased continuously by a small factor and contrast passed through a maximum (80 percent greater than for large area image) at a spatial frequency between 3/8 and 3 cycles/millimeter then decreased with increasing spatial frequency back to the large image level. The contrast and speed for noninfectious development were essentially independent of spatial frequency. The change in speed and contrast for both the infectious and noninfectious development were relatively independent of exposure level.
Library of Congress Subject Headings
Photography--Printing processes--Toning; Photography--Processing
Department, Program, or Center
School of Photographic Arts and Sciences (CIAS)
Lopez, Julian, "Tone Reproduction of Small-Scale Images Using Lithographic Film Under Infectious and Noninfectious Developmental Conditions" (1971). Thesis. Rochester Institute of Technology. Accessed from
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