Studies on the Photographic Stabilizers. I

Relationship between Photographic Effects and Chemical Constitutions

Abstract

Emulsion tests were carried out on 34 kinds of compounds and their properties as a stabilizer was examined from their effect on photographic properties at the time of addition to the emulsion and from their inhibition of chemical ripening. Results so obtained are presented in Table III, and effect of these compounds on the inhibition of chemical ripening is compared in Table IV. From these data, relationship between chemical structure and photographic action was examined. Of the three compounds obtained by the application of ethyl iodide to silver salt of 5-hydroxy-7-methyl-1, 2, 4-triazolo[4, 3-a]pyrimidine, the two that were not ethoxyl compound was found to be the N-ethyl compound from their infrared absorption spectra.