Title:
スタンプ用多色変色性インキ組成物及びそれを用いたスタンプ
Document Type and Number:
Japanese Patent JP7256068
Kind Code:
B2
Abstract:
To provide a multicolor discoloring ink composition for stamp which is rich in vividness of each color before and after discoloration and is high in a commercial value, and a stamp using the same.SOLUTION: There are provided a multicolor discoloring ink composition for stamp that is composed of a reversible thermochromic pigment A, a reversible thermochromic pigment B and a medium, in which the reversible thermochromic pigment A and the reversible thermochromic pigment B become completely colored states when the temperatures have reached a complete coloring temperature (t1) by temperature decrease from colorless states, and become completely colorless states when the temperatures have reached a complete colorless temperature (t4) by temperature increase from the colored states, and the complete colorless temperature (t4) of the reversible thermochromic pigment B is on a higher temperature side than the complete colorless temperature (t4) of the reversible thermochromic pigment A, and the reversible thermochromic pigment B is a pigment having fluorescence in color development; and a stamp using the same.SELECTED DRAWING: Figure 3
Inventors:
Akio Nakajima
Application Number:
JP2019086985A
Publication Date:
April 11, 2023
Filing Date:
April 29, 2019
Export Citation:
Assignee:
Pilot Corporation Co., Ltd.
International Classes:
C09D11/037; B41K1/50
Domestic Patent References:
| JP2015209444A | ||||
| JP2004149726A | ||||
| JP2009126999A | ||||
| JP2019112549A |
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