The order of addition of 4-hydroxy-6-methyl-1,3,3a,7-tetrazaindene and dyes into silver chloride emulsion

This study examined the supersensitization of 4-hydroxy-6-methyl-1,3,3a,7-t etrazaindene (TAI) in silver chloride emulsions. A systematic investigation on the concentration of TAI and the order of adding TAI and dyes had been carried out. Tt was discovered that the supersensitization efficiency of TA I varied greatly with the order of adding TAI and the concentration of TAI. The spectrometry study suggested that TAI could intensify the formation of the J-aggregate of dye and had quite different effects on the absorption s pectra and spectral distribution of emulsion sensitivity when added in diff erent orders.