Discussion about Mechanism in Process of Sensitization of Direct Positive Sensitizing Material of Silver Salt

摘要

With utilization of electronic trap interior grain of halogenated silver and cineration nucleus on the halide surface, direct positive sensitizing material of silver salt achieves direct copy of positive image, Under certain circumstance, we can deoxidize partial silver ions to silver atoms on the surface of homogenate silver with reducer, then to cineration nucleuses.But we can't deoxidize halogenated silver grains which contain abundant electronic traps inside to cineration nucleuses without certain conditions. Naturally the grain has stronger ability of absorbing electron than interior electronic trap. If the deduction is true, so direct positive sensitizing material of silver salt won't has the positive sensitizing character, which is contrary to practical application.