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1. (WO2017033489) TEMPERATURE HISTORY DISPLAY OBJECT

Pub. No.:    WO/2017/033489    International Application No.:    PCT/JP2016/060878
Publication Date: Fri Mar 03 00:59:59 CET 2017 International Filing Date: Sat Apr 02 01:59:59 CEST 2016
IPC: C09K 3/00
G01K 11/06
Applicants: HITACHI, LTD.
株式会社日立製作所
Inventors: SASAKI Hiroshi
佐々木 洋
AIDA Kohhei
會田 航平
TADA Yasuhiko
多田 靖彦
ARATANI Sukekazu
荒谷 介和
KAWASAKI Masahiro
川崎 昌宏
YUASA Toyotaka
湯浅 豊隆
Title: TEMPERATURE HISTORY DISPLAY OBJECT
Abstract:
The purpose of the present invention is to provide a temperature history display object with which the time when the temperature of the display object deviated from storage temperatures can be specified. The temperature history display object according to the present invention is characterized by comprising a color developer layer constituted of an open-cell porous object having a color developer supported therein, a color former layer constituted of an open-cell porous object having a color former supported on a surface thereof, and a barrier layer which separates the color developer layer from the color former layer, the barrier layer having been disposed between the color developer layer and the color former layer and adjoining the color developer layer and the color former layer in a horizontal direction.