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Machine translation
1. (WO1981001754) METHOD FOR THE PRECIPITATION OF SILVER HALIDES
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/1981/001754    International Application No.:    PCT/FR1980/000170
Publication Date: 25.06.1981 International Filing Date: 27.11.1980
IPC:
G03C 1/015 (2006.01)
Applicants:
Inventors:
Priority Data:
116685 30.01.1980 US
Title (EN) METHOD FOR THE PRECIPITATION OF SILVER HALIDES
(FR) PROCEDE DE PRECIPITATION D"HALOGENURES D"ARGENT
Abstract: front page image
(EN)Such method comprises reacting an aqueous solution of a silver salt (7) and an aqueous solution of a metal halide in a dispersion medium (3), to form germs of silver halides in the dispersion medium and growing those germs of silver halides in a reaction vat, in which the germs of silver halides and the dispersion medium are present. During the growth of silver halides present in the dispersion medium, the volume of the dispersion is reduced by separating a fraction (13) of the dispersion medium while maintaining the grains of silver halides in the residual fraction withdrawn that is returned by the stream (19) into the reaction vat. Application to the preparation of photographic emulsions with silver halides.
(FR)Le procede suivant l"invention consiste a faire reagir une solution aqueuse d"un sel d"argent (7) et une solution aqueuse d"un halogenure metallique dans un milieu de dispersion (3), pour former des germes d"halogenures d"argent dans le milieu de dispersion, puis a faire croitre ces germes d"halogenures d"argent dans un recipient de reaction, dans lequel les germes d"halogenures d"argent et le milieu de dispersion sont presents. Pendant la croissance des halogenures d"argent presents dans le milieu de dispersion, on reduit le volume de la dispersion en separant une fraction (13) du milieu de dispersion tout en maintenant les grains d"halogenures d"argent dans la fraction soutiree residuelle que l"on renvoie par le courant (19) dans le recipient de reaction. Application a la preparation d"emulsions photographiques aux halogenures d"argent.
Designated States:
Publication Language: French (FR)
Filing Language: French (FR)