Reversible thermosensitive coloring material and reversible...

Details Reversible thermosensitive coloring material and reversible... Reversible thermosensitive coloring material and reversible...

2007-05-01

2008-09-02

Hess, Bruce H (Department: 1794)

Record receiver having plural interactive leaves or a colorless

Having a colorless color-former, developer therefor, or...

Method of use, kit, or combined with marking instrument or...

C503S216000

Reexamination Certificate

active

07419934

ABSTRACT:
A reversible thermosensitive coloring material which can reversibly achieve a relatively colored state and a relatively discolored state depending on a temperature to which the coloring material is heated or a cooling speed at which the coloring material is cooled after heated. The coloring material including an electron donating coloring agent; an electron accepting color developer configured to color the coloring agent; and a compound having a Zwitter ion in which a total of charges in a molecule of the compound is zero. A reversible thermosensitive recording material including a substrate and a reversible thermosensitive recording layer, which is located overlying the substrate and which includes the reversible thermosensitive coloring material.

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