Title:
DISPLAY MEDIUM
Document Type and Number:
WIPO Patent Application WO/2018/042527
Kind Code:
A1
Abstract:
[Problem] To provide a display medium that is discolored in a state of being exposed in the presence of oxygen. [Solution] This display medium has a discoloration layer on a substrate, the discoloration layer being formed with a redox dye, a food dye, a reducing sugar, an edible reduction promoter, an edible moisturizer, and an oxygen detection composition that contains an edible thickener. The oxygen detection composition that forms the discoloration layer is reversibly discolored in accordance with the presence of oxygen, so that the discoloration layer changes color upon transition from an oxygen-free state to an oxygen-present state. Therefore, when the discoloration layer is formed with a letter, a drawing pattern, a symbol or the like, information relating to a commodity constituted by the letter, drawing pattern, symbol or the like is highlighted by discoloration.
Inventors:
YAMAZAKI TATSUO (JP)
KASE HIROSHI (JP)
ABE NAOTO (JP)
KASE HIROSHI (JP)
ABE NAOTO (JP)
Application Number:
PCT/JP2016/075387
Publication Date:
March 08, 2018
Filing Date:
August 31, 2016
Export Citation:
Assignee:
TOKIWA SANGYO CO LTD (JP)
International Classes:
G09F3/02; B65D25/20; B65D81/24; G01N31/00; G01N31/22
Foreign References:
| JP2009107646A | 2009-05-21 | |||
| JPS568547A | 1981-01-28 | |||
| JP2007183157A | 2007-07-19 | |||
| JP2008069278A | 2008-03-27 | |||
| JP2001124759A | 2001-05-11 |
Other References:
See also references of EP 3509054A4
Attorney, Agent or Firm:
KOHDA, Masahiro (JP)
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