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1. (WO2017204018) INK FOR STAMP, AND STAMP PAD

Pub. No.:    WO/2017/204018    International Application No.:    PCT/JP2017/018197
Publication Date: Fri Dec 01 00:59:59 CET 2017 International Filing Date: Tue May 16 01:59:59 CEST 2017
IPC: C09D 11/037
B41K 1/54
C09D 11/50
Applicants: SEIKO EPSON CORPORATION
セイコーエプソン株式会社
Inventors: WATANABE Shotaro
渡辺 昭太朗
SONOYAMA Takuya
園山 卓也
Title: INK FOR STAMP, AND STAMP PAD
Abstract:
The purpose of the present invention is to provide an ink with which an imprint that in the normal state cannot be visually recognized and that, upon irradiation with light which is not ultraviolet light, which is regarded as harmful to the human body and as accelerating the deterioration of substances, becomes visually recognizable can be formed by stamping on a living body, e.g., a human body, thereby enabling security information to be stamped. The ink for stamps contains particles constituted of a material which emits upconversion luminescence.