Title:
スタンプ用熱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 JP7280756
Kind Code:
B2
Abstract:
To provide a thermochromic ink composition for stamps having high commodity value, which is difficult to recognize a residual color during decolorization and can recognize clear stamp image during rewriting to a decolored position of a two-step coloration ink which changes color from coloration (1) to coloration (2), furthermore, to decoloration, and a stamp using the same.SOLUTION: A thermochromic ink composition for stamps that is an ink composition for stamps, which is formed by containing two or more kinds of colorants that become a decolored state by heating, in which a residual color during thermal decoloration of an ink coated on JIS P3201 writing paper A is 7 or smaller by a color difference with the writing paper A by ΔE*ab. A stamp that accommodates the ink composition.SELECTED DRAWING: Figure 7
Inventors:
Akio Nakajima
Hiroshi Umemoto
Hiroshi Umemoto
Application Number:
JP2019111116A
Publication Date:
May 24, 2023
Filing Date:
June 14, 2019
Export Citation:
Assignee:
Pilot Corporation Co., Ltd.
International Classes:
C09D11/50; B41K1/54; B43L19/00
Domestic Patent References:
| JP2015209444A | ||||
| JP2018203933A | ||||
| JP2009126999A | ||||
| JP2018141059A | ||||
| JP2002519224A | ||||
| JP2008280523A | ||||
| JP2009067863A | ||||
| JP2014167071A | ||||
| JP2019157061A | ||||
| JP2020183467A | ||||
| JP2020183466A |
Foreign References:
| US20170088737 | ||||
| US6124377 | ||||
| US20100120614 |
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