Yasumasa Numata

Title: **Yasumasa Numata: A Pioneer in Silver Halide Photographic Materials**

Introduction

Yasumasa Numata, an innovative inventor based in Hino, Japan, has made significant contributions to the field of photography. With a total of two patents to his name, Numata's work primarily focuses on enhancing the effectiveness of silver halide color photo-sensitive materials, which are crucial in photographic applications.

Latest Patents

Among his most notable patents is the creation of a silver halide color photo-sensitive material. This invention features ballasted couplers that are ingeniously combined with photosensitive silver halide emulsions. It also includes colored compounds that can react with oxidized developing agents. These compounds are designed to diffuse within the photographic material during the developing process, showcasing principal absorption in the main wavelength region of the dye produced by the coupling reaction.

His other significant patent is a colored light-sensitive silver halide photographic material with a distinct coating. This innovative material incorporates a basic mordant, an acidic dye, and a hydrophilic colloid layer that contains unique compounds. These layers contribute to the overall efficacy and functionality of the photographic material, making it a remarkable advancement in the field.

Career Highlights

Yasumasa Numata is currently associated with Konishiroku Photo Industry Co., Ltd., a company known for its contributions to imaging technology. His dedication to research and development within the company has led to the advancement of photographic materials, enhancing both quality and performance standards in the industry.

Collaborations

Throughout his career, Numata has worked alongside talented individuals such as Mitsuto Fujiwhara and Takao Nimura. These collaborations have fostered a creative environment that thrives on innovation, leading to remarkable advancements in photographic technology.

Conclusion

Yasumasa Numata's ingenuity in developing silver halide photographic materials has marked him as a significant figure in the field of photography. His contributions are not only valuable to the industry but also pave the way for future innovations in imaging technologies. As a dedicated inventor, he continues to inspire others in the realm of photography and material science.