Effects of µs Pre-Exposure on Latent Image Formation in 103, 103a and I-N Kodak Spectroscopic Plates: Results and Limits

Abstract

The sensitizing effects of pre-exposure and their relationship with the formation, in the pre-exposed emulsion, of a sub-developable stable latent image have been examined. Having as a general scheme the theories of latent image formation, the authors have checked the possibility of improving the ratio of sub-developable to developable stable latent image by using a us pre-flashing technique.

Experiments made on some types of Kodak plates have shown that this improvement can be attained at least for small increments in density, but only with “non-a” emulsions. In particular 103-O plates can reach almost the same sensitivity as l03a-O.

No “non-a” emulsions type has been found which, using this technique, could surpass the sensitivity of the “a” plate with similar characteristics.