E.i. Dupont De Nemours and Company

Daniel Frederick Juers

John G Van Remoortel

Edward Andrew Calisto

Daniel J Mickewich

John R Shock

An apparatus for washing a web or sheet of photosensitive material during the development process by passing the material through a series of stations where the washing is accomplished by spraying and the material is not immersed into a wash bath and the washed material consistently meets archival quality and a process for washing the material using the apparatus.

Method and apparatus for processing photosensitive material

A process for recycling a spent hydroquinone developer for black-and-white photographic processing which comprises the steps of determining the volume of developer, optionally filtering the developer, and reconstituting the developer, whereby the spent developer is brought back to substantially the same composition and/or level of performance as fresh developer wherein the recycled developer can be used to process black-and-white photographic materials without adverse effects.

Recycling spent hydroquinone developer and a recycled hydroquinone

A method is disclosed for controlling the flow rate of wash water in a silver halide film processor.

Low wash water silver halide film processor

High contrast photographic images suitable for lithographic use are obtained with stable (nonlithographic) developers when iodide is released from a surface-sensitized iodobromide emulsion to induce development of the exposed areas in an internally sensitized core-shell emulsion. A bromoiodide or trihalide core is produced by balanced double jet precipitation, then the core is chemically sensitized and covered with a chlorobromide or chloride shell by balanced double jet precipitation or preferably by a cyclic pAg addition technique. The core-shell emulsion must have a sensitivity equal to or greater than the surface sensitized emulsion.

Growing community of inventors

Fairport, NY, United States of America

Daniel Frederick Juers