Abstract:
The so-called high intensity reciprocity law failure of a silver halide photographic emulsion can be unexpectedly effectively prevented by adding to the silver halide photographic emulsion produced by the known method a gold salt and a polyalkylene oxide. The effect can be further improved by additionally adding thereto at least one compound selected from soluble salts of cadmium, zinc, cobalt, nickel, thallium, uranium, thorium, iridium, strontium and lead.
Abstract:
A lith type photographic material, the development of which can be easily controlled, is obtained by use of a fine grain photographic silver halide emulsion to which have been added a polyethylene oxide, or a derivative thereof, and a triazoline derivative, or a tautomeric compound thereof, having the general formula, wherein R is a hydrogen atom or an alkyl group having 1 to 5 carbon atoms; and A is an amino group, an acid amide group having 2 or 3 carbon atoms, an alkyl group having 1 to 3 carbon atoms, or an allyl group.
Abstract:
A DIFFUSION TRANSFER IMAGE HAVING DENSELY BLACK IMAGE TONE IS PRODUCED BY EFFECTING DEVELOPMENT AND DIFFUSION IN THE PRESENCE OF 4-AMINO-1,2,4-TRIAZOLINE-5-THIONE DERIVATIVES. THE EXAMPLES OF SAID DERIVATIVES ARE 4-AMINO-3ETHYL - 1,2,4- TRIAZOLINE-5-THIONE, 4-AMINO-3-PROPYL-1,2,4TRIAZOLINE-5''-THIONE, ETC.