Company Filing History:
11 out of 83 
10 out of 30 
2 out of 43 Years Active: 2012-2025
Title: Innovations of Yuji Kameyama
Introduction
Yuji Kameyama is a prominent inventor based in Tokyo, Japan. He has made significant contributions to the field of ink technology, holding a total of 13 patents. His work focuses on developing advanced water-based inkjet inks and methods for producing high-quality printed materials.
Latest Patents
One of Kameyama's latest patents is for a water-based inkjet ink and method for producing inkjet printed material. This invention involves an inkjet ink that contains a mixed crystal pigment, which includes two or more naphthol-based azo pigments, a binder resin with a specific acid value, a surfactant, and a water-soluble organic solvent. The formulation is designed to ensure that the amount of the water-soluble organic solvent with a boiling point of 240° C. or more is limited to 8% by mass or less relative to the total amount of the ink. Another notable patent is for an ink set, recording method, and printed item. This ink set is designed for single-pass printing and includes cyan, magenta, yellow, and gray inks, with specific conditions regarding spectral reflectance for the magenta and gray inks.
Career Highlights
Kameyama has worked with notable companies in the ink industry, including Toyo Ink Sc Holdings Co., Ltd. and Toyo Ink Co., Ltd. His experience in these organizations has allowed him to develop innovative products that enhance the quality and efficiency of inkjet printing.
Collaborations
Throughout his career, Kameyama has collaborated with talented individuals such as Kazuhiro Jonai and Mayuko Okamoto. These partnerships have contributed to the advancement of his research and the successful development of his patented technologies.
Conclusion
Yuji Kameyama's contributions to ink technology through his patents and collaborations highlight his role as an influential inventor in the field. His innovative approaches continue to shape the future of inkjet printing.