Takehisa Kishita

Title: Takehisa Kishita: Innovator in Silver Halide Photographic Emulsions

Introduction

Takehisa Kishita is a notable inventor based in Hino, Japan, recognized for his contributions to the field of photographic emulsions. He holds two patents that focus on the manufacturing processes of silver halide photographic emulsions, which are essential in the photography industry.

Latest Patents

Kishita's latest patents include a "Manufacturing process for silver halide photographic emulsion" and a "Method of preparing silver halide photographic emulsion." The first patent describes a process for creating a silver halide direct positive type emulsion primarily composed of silver bromide. This process involves the simultaneous addition of silver and halide aqueous solutions to form a mixture with a controlled silver potential. The second patent outlines a method for preparing a silver halide photographic emulsion with silver chloride as the main component. This method also emphasizes maintaining specific growth rates and electrochemical values during the emulsification process.

Career Highlights

Throughout his career, Takehisa Kishita has worked with prominent companies in the photography sector, including Konishiroku Photo Industry Co., Ltd. and Konishiroku Photo Ind. Co., Ltd. His work has significantly impacted the development of photographic materials and processes.

Collaborations

Kishita has collaborated with notable individuals in his field, including Atsuo Ezaki and Morio Enomoto. These collaborations have contributed to advancements in photographic technology.

Conclusion

Takehisa Kishita's innovative work in silver halide photographic emulsions has made a lasting impact on the photography industry. His patents reflect a deep understanding of the chemical processes involved in photographic emulsion manufacturing.