Fuji Photo Film Company, Limited

Kazuo Shirasu

Akira Abe

Kazushige Uenaka

Toshiro Tahara

Fumio Nakagawa

Sachio Matsushita

Tetsuya Masuda

Shinichi Kashiwagi

Yoshio Usui

Hiroyuki Hirai

Yoshio Idota

Isao Shimamura

Haruhiko Iwano

The efficiency of silver recovery from photographic processing solutions is improved by the installation of a silver recovery water tank between the fix or blix tank and the wash water tank, which is provided with a mechanism for maintaining the silver concentration of said recovery tank at a substantially constant value, said mechanism comprising a detecting means for measuring the amount of the photographic material treated by the processing line involved and a means to supply water thereto operatable by signal from said detecting means.

Apparatus for silver recovery during photographic processing

Method and apparatus for silver recovery during photographic processing

A method for removing fogging and/or color mixing components formed in a color developer containing an aromatic primary amine developing agent during the development processing using the color developer which comprises contacting the color developer with an aqueous solution through a continuous fine open-cell porous diaphragm of a hydrophobic material to thereby transfer the fogging and/or color mixing components from the color developer to the aqueous solution.

Method for removal of fogging components in photographic processing

A process for electrolyzing a bleach-fixed solution, or blix solution, used in processing color photographic materials, which contains originally an iron (III) chelate compound and a silver halide solvent in an electrolytic bath and separating the cathode compartment and the anode compartment of the electrolytic cell with a porous membrane and controlling the anode potential so that the silver halide solvent does not decompose. Embodiments include use of a carbon fiber as the anode and also controlling the cathode potential and the current densities of the cathode and the anode.

Electrolytic oxidation of blix solution

Growing community of inventors

Minami-ashigara, Japan

Kazuo Shirasu