Manually actuated dispensers and kit for roomlight processing of

Details Manually actuated dispensers and kit for roomlight processing of Manually actuated dispensers and kit for roomlight processing of

1998-06-05

2000-07-04

Rutledge, D.

Photography

Fluid-treating apparatus

Having fluid-circulating means

396636, C03D 302

Patent

active

060829095

ABSTRACT:
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.

REFERENCES:
patent: 3630744 (1971-12-01), Thiers et al.
patent: 4518240 (1985-05-01), Taylor et al.
patent: 4518684 (1985-05-01), Martin
patent: 4803150 (1989-02-01), Dickerson et al.
patent: 5274691 (1993-12-01), Neri
patent: 5370977 (1994-12-01), Zietlow
patent: 5956539 (1999-09-01), Fitterman et al.

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