Hiromitsu Uchiyama

Title: Hiromitsu Uchiyama and Inkjet Printing Innovation.

Introduction

Hiromitsu Uchiyama is an inventor based in Tokyo, Japan, who is associated with Toppan Holdings Inc. His work includes an inkjet ink formulation designed to help printed images retain their color under different humidity conditions.

Latest Patents

Uchiyama is named on one patent: “Inkjet ink and tablet printed matter.” The invention addresses photodiscoloration and photofading, aiming to maintain the lightfastness of printed images in both low-humidity environments of about 20% relative humidity and normal-humidity environments of about 50%.

The disclosed ink contains Blue No. 1 food dye at 0.1–2.5 mass percent of the total ink mass. It also contains reduced isomaltulose as a fixing agent, at 5.7–16.2 times the mass of the Blue No. 1. The invention also covers tablet printed matter with parts printed using the ink.

Career Highlights

Uchiyama’s listed patent reflects work on inkjet printing materials and printed tablets. The formulation focuses on preserving image quality across varying storage and use conditions.

Collaborations

Uchiyama’s listed coworkers include Yasuhisa Miyazawa and Seiya Koseki. His patent is associated with Toppan Holdings Inc.

Conclusion

Hiromitsu Uchiyama’s patent presents an inkjet ink approach intended to improve the lightfastness of printed images across different humidity environments.