Water-based ink set for writing instruments
The aqueous ink set with specific absorption wavelength differences and compositions allows for a broader range of color tones in writing instruments, enhancing color adjustment.
JP2026110714APending Publication Date: 2026-07-02PILOT PEN CO LTD
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- PILOT PEN CO LTD
- Filing Date
- 2026-04-23
- Publication Date
- 2026-07-02
AI Technical Summary
Technical Problem
Existing ink compositions for writing instruments are limited in the range of color tones that can be adjusted.
Method used
An aqueous ink set comprising ink compositions with specific differences in maximum absorption wavelengths and compositions, including cyan, magenta, yellow, and optionally transparent and black inks, to broaden the range of achievable colors.
Benefits of technology
Enables the production of a wide range of colors by mixing these ink compositions, improving color adjustment capabilities.
✦ Generated by Eureka AI based on patent content.
Smart Images
Figure 2026110714000001_ABST
Abstract
We offer a water-based ink set for writing instruments that allows for adjustment to a wide range of colors. [Solution] The water-based ink set for writing instruments comprises a first ink composition, a second ink composition, and a third ink composition, each having a maximum absorption wavelength in the visible light region and being of different colors from one another. The difference between the maximum absorption wavelength of the first ink composition and the maximum absorption wavelength of the second ink composition is 100 nm or more, and the difference between the maximum absorption wavelength of the second ink composition and the maximum absorption wavelength of the third ink composition is 100 nm or more.
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