Company Filing History:
Years Active: 1999
Title: Innovations in Silver Halide Photography by Katsuyuki Arasawa
Introduction
Katsuyuki Arasawa is a notable inventor in the field of photography, particularly known for his contributions to silver halide photographic materials. He is based in Kanagawa, Japan, and has been instrumental in developing methods that enhance photographic quality while addressing environmental concerns.
Latest Patents
Arasawa holds two significant patents related to silver halide photographic materials. His first patent focuses on a silver halide photographic material and an image forming method that allows for the creation of monochrome images using dye images, even when treated with a color developer that is free of benzyl alcohol. This innovation ensures that the photographic properties of the monochrome image are less affected by toxic gases such as formaldehyde, while also improving sensitization and reducing fog over time. The material comprises a support, at least one silver halide emulsion layer, and a non-photosensitive hydrophilic colloidal layer, with specific components that enhance its performance.
The second patent also pertains to silver halide photographic materials and processes for forming images. This invention enables the production of black-and-white pictures using dye images, processed with a color developer that is substantially free from benzyl alcohol. The silver halide emulsion layer in this patent contains a high percentage of silver chloride and includes various couplers, ensuring minimal deterioration of photographic characteristics due to harmful gases.
Career Highlights
Katsuyuki Arasawa is associated with Oriental Photo Industrial Co., Ltd., where he has made significant strides in photographic technology. His work has not only advanced the field but has also contributed to the development of safer photographic practices.
Collaborations
Throughout his career, Arasawa has collaborated with notable colleagues such as Toshio Hirosawa and Kouji Katsube. These partnerships have fostered innovation and have been pivotal in the advancement of their shared goals in photography.
Conclusion
Katsuyuki Arasawa's contributions to silver halide photography demonstrate his commitment to innovation and environmental responsibility. His patents reflect a deep understanding of both the technical and ecological aspects of photographic materials.