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The Utica Club Show, Frank Leto
The Utica Club Show, Frank Leto
The Effect Of Photographic Reducers In Autoradiographic Intensification Method For Image Recovery Of Incorrectly Exposed Radiographs, Donald Vachon
The Effect Of Photographic Reducers In Autoradiographic Intensification Method For Image Recovery Of Incorrectly Exposed Radiographs, Donald Vachon
Theses
Autoradiographic image intensification methods for recovering the images of underexposed step wedges, resolution targets and radiographs were investigated. The fog level of the intensified image was decreased by treating the film in a subproportional photographic reducer (mixture of potassium ferricyanide and sodium thiosulfate) prior to activation with S-35 thiourea. The fog level of intensified images of a step wedge decreased from a density of 1.32 to .12, the maximum contrast increased from 2.08 to 5.52, the relative speed increase calculated at 0.6 above fog level increased from 3.05 to 4.06 while resolution remained the same at 5.0 lines per millimeter.Radiographs …
Found Television Images, Janice Hope Meyers
The Editorial Decision In Photography, Lyn Adams
Photography, Painting, And The Spirit World, Laura Bench
Lotte Jacobi: A Composite Portrait, Peter Moriarty
Modifications Of A Herrnfeld Sensitometer For Interimage Studies, Charles Tobin
Modifications Of A Herrnfeld Sensitometer For Interimage Studies, Charles Tobin
Theses
An available Herrnfeld Sensitometer has been rebuilt and modified to include a six position filter wheel, three narrow band interference filters, a separate D.C. power supply, and a central control panel. The modified sensitometer expedites the single layer exposure of color film. The system accomplishes this by using interference filters whose band-width peaks are matched to the peak spectral sensitivity of each emulsion layer to be exposed. A D.C. power supply has been included to eliminate lamp ripple caused by the oscillations that occur in the A.C. line. In depth experimentation (approximately 20 rolls of film) produced exposures closely approximating …