Shirow Askawa

Title: Shirow Askawa: Innovator in Photographic Processes

Introduction

Shirow Askawa is a notable inventor based in Kawasaki, Japan. He has made significant contributions to the field of photographic processes, particularly through his innovative patent related to N-vinyl compound systems. His work has implications for the development of high-contrast photographic images.

Latest Patents

Shirow Askawa holds a patent for a dry working photographic process that involves a film coated with a dispersion of an N-vinyl compound, an organic halogen compound, and a sensitizer in gelatin. This process includes preheating the film at temperatures between 60°C and 120°C before imagewise exposure. This step is crucial for sensitizing the film and eliminating fog-nuclei. After exposure, the film undergoes a red light flood exposure to intensify the latent image, followed by heating for development and flood light exposure for fixing, resulting in a negative image of high contrast. Notably, the preheating can also be applied to a film that has already been exposed, allowing for the extinguishing of the latent image and enabling another exposure.

Career Highlights

Shirow Askawa is associated with Matsushita Electric Industrial Co., Ltd., where he has been able to apply his innovative ideas in a practical setting. His work has contributed to advancements in photographic technology, showcasing his expertise in the field.

Collaborations

Throughout his career, Shirow Askawa has collaborated with notable colleagues such as Shunsuke Matsuda and Katsue Hasegawa. These collaborations have likely enriched his work and contributed to the development of innovative solutions in photographic processes.

Conclusion

Shirow Askawa's contributions to the field of photography through his patented processes highlight his role as an innovator. His work continues to influence the industry, demonstrating the importance of innovation in advancing technology.