Joan F Rachel

Title: The Innovative Contributions of Joan F Rachel

Introduction

Joan F Rachel is a notable inventor based in Penfield, NY (US). She has made significant contributions to the field of photography through her innovative patents. With a total of 4 patents, her work has had a lasting impact on photographic developing compositions.

Latest Patents

One of her latest patents focuses on black-and-white developing compositions and methods of use. This concentrated black-and-white photographic developing composition boasts improved stability and environmental compatibility while providing desired sensitometric properties. It incorporates specific antifoggants, including a mercapto-substituted tetrazole and a benzimidazole with electron-withdrawing groups. This composition can be utilized as a first "part" and mixed with a diluted second "part" that contains a gelatin hardening agent. When combined, these two diluted concentrates create a working strength developing composition suitable for producing black-and-white images in various photographic silver halide materials, particularly in radiographic films. Another patent details a method for processing black-and-white elements, such as radiographic films, using a developing composition that includes a hydroquinone developing agent along with specific amounts of sulfite and borate ions. This composition is designed to be effective, rapid, and stable.

Career Highlights

Joan F Rachel is currently associated with Eastman Kodak Company, where she continues to innovate in the field of photography. Her work has not only advanced photographic technology but has also contributed to the development of environmentally friendly solutions in the industry.

Collaborations

Throughout her career, Joan has collaborated with esteemed colleagues, including Alan S Fitterman and Shirleyanne E Haye. These collaborations have further enriched her contributions to the field.

Conclusion

Joan F Rachel's innovative work in photographic developing compositions showcases her dedication to advancing technology in photography. Her patents reflect a commitment to both quality and environmental sustainability, making her a significant figure in her field.