Eastman-kodak Company

Other

Alan S Fitterman

Robert E Dickerson

Franklin C Brayer

Jeffrey S Baugher

Joan F Rachel

Ronald J Perry

Peter J Kelch

Kenneth A Duke

David G Sherburne

Shirleyanne E Haye

Jean Marie Buongiorne

Janet M Huston

Phillip C Bunch

James T Samuels

Nathan J Romano

Photographic silver halide materials containing an incorporated black-and-white developing agent can be quickly and simply processed using unique processing compositions and methods. In a 'two-step' method, the exposed material is contacted with an alkaline activator solution followed by a fixing composition. In a 'one-step' method, activation and fixing are combined using a single alkaline activator-fixing composition containing the fixing agent. None of the processing solutions include black-and-white developing agents. The photographic silver halide materials are preferably radiographic silver halide materials that have a reflective support and provide black-and-white images that can be viewed without a light box.

Method of processing silver halide materials

A reflective radiographic material is useful to provide images that can be viewed without a light box. This reflective radiographic material has a reflective support and a silver halide emulsion on one side of the support only. The material can be used with a single green- or blue-light emitting fluorescent intensifying screen as part of an imaging assembly. The reflective support enables the image in the radiographic material to be viewed without a light box and the speed of the material enables the use of low power X-radiation generating equipment.

High speed reflective radiographic material

A reflective radiographic material (at least 200 system speed) is useful especially to provide images that can be viewed without a light box. This reflective radiographic material has a reflective support, a silver halide emulsion on one side of the support only, and a photographic speed of at least 200. The reflective material also includes an incorporated black-and-white developing agent and a co-developing agent, and can be used with a single fluorescent intensifying screen as part of an imaging assembly. The reflective support enables viewing the resulting image without a light box and the high speed of the material enables the use of low power X-radiation generating equipment. The incorporated black-and-white developing agent and co-developing agent allow the radiographic material to be quickly processed after exposure using simplified processing chemistry.

Reflective radiographic material with incorporated developer

A concentrated black-and-white photographic developing composition has improved stability, is compatible with the environment and provides desired sensitometric properties with a combination of particular antifoggants. These antifoggants include a mercapto-substituted tetrazole and a benzimidazole that has one or more electron withdrawing groups. This concentrated composition can be used as a first &ldquo;part&rdquo; and mixed, upon dilution, with a diluted second &ldquo;part&rdquo; that is a concentrated composition of a gelatin hardening agent. When mixed together, the two diluted concentrates form a working strength developing composition that can be used to provide black-and-white images in various photographic silver halide materials, and particularly in radiographic films.

Black-and-white developing compositions and methods of use

Low silver black-and-white photographic elements, such as radiographic films, can be processed quickly using black-and-white developing and fixing compositions having reduced photoprocessing activity. The entire process is fairly rapid and effective despite the lowered concentrations of photographic developing and fixing agents. The processing compositions are more environmentally friendly because the conventional hydroquinone is replaced with an ascorbic acid developing agent. In addition, the processing compositions are free of ammonium ions.

Processing low silver black-and-white photographic elements with

Low silver black-and-white photographic elements, such as radiographic films, can be processed quickly using a two-stage process in which black-and-white development is carried out in the first stage for up to 30 seconds, and such development continues along with fixing in the second stage for up to 60 seconds when a fixing composition is added. Both stages are carried out in the same processing container.

Two-stage processing of low silver black-and-white photographic elements

Low silver black-and-white photographic silver halide elements, such as radiographic films, can be processed quickly using black-and-white developing and fixing compositions having reduced photoprocessing activity. The entire process is fairly rapid and effective despite the lowered concentrations of photographic developing and fixing agents.

Processing of low silver black-and-white photographic elements

Black-and-white elements, such as radiographic films, can be processed in roomlight because they include certain light absorbing dyes and desensitizers. Processing of such elements can be achieved using a processing kit and a two-stage process carried out in the same light- and fluid-tight processing apparatus. In the first stage, development is initiated with a developing composition having a pH of from about 10 to about 12.5, and comprising an appropriate black-and-white developing agent and a sulfite. After an appropriate time, a non-sulfite fixing agent is introduced into the processing apparatus or container to provide a combined developing/fixing composition, and development and fixing are carried out simultaneously. The processing method is carried out quickly, usually within about 90 seconds. The presence of sulfite and high pH in both stages decolorizes or deactivates the particulate dyes. The processing kit includes the photographic element, a first vessel containing a developing composition, a second vessel containing a fixing composition, and a container for holding an exposed element. The first and second vessels have manually actuated dispensers for dispensing developing composition and fixing composition into the container for processing of the exposed element.

Manually actuated dispensers and kit for roomlight processing of

Low silver black-and-white photographic silver halide elements, such as radiographic films, can be processed quickly using a developing/fixing monobath composition that includes an ascorbic acid developing agent, sulfite ions and a photographic fixing agent that has both a thiol group and an amino group (such as cysteine).

Developing/fixing monobath and its use for processing low silver

Processing of low silver black-and-white photographic elements with

Black-and-white elements, such as radiographic films, can be processed in roomlight because the developing composition includes a water-soluble colorant. Such colorants are water-soluble dyes that have a maximum absorption wavelength of from about 350 to about 500 nm. Processing is carried out by processing the exposed element using a two-stage process in the same processing container. In the first stage, development is initiated with an opaque developing composition having a pH of from about 10 to about 12.5, and comprising an appropriate black-and-white developing agent, a yellow colorant, and a sulfite. After an appropriate time, a fixing agent (other than a sulfite) is introduced into the processing container to begin simultaneous development and fixing. The entire process in quite rapid, that is less than 90 seconds.

Yellow dye-containing developing composition and its use in two-stage

Black-and-white elements, such as radiographic films, can be processed in roomlight using a developing/fixing monobath composition that also includes a water-soluble colorant, such as a water-soluble 'yellow' dye, that provides safelight conditions in the processing composition. The processing method is carried out quickly, that is within 120 seconds. The colorant has a maximum absorption wavelength of from about 350 to about 500 nm, and is transparent in solution.

Growing community of inventors

Rochester, NY, United States of America

Alan S Fitterman