Patent ID: 6015770
Filing Date: 2000-01-18
Classification: B41M

Abstract:
A reversible thermosensitive recording material comprising a substrate having at least two opposed sides and a recording layer which is formed overlying at least one part of at least one side of the substrate, the recording layer comprising a particulate low-molecular weight organic material dispersed in a resin and from about 5% to about 60% of a reactive polymer and having first and second color states, in which the color state of the recording layer becomes a first color state at a first coloring temperature higher than room temperature when the recording layer is heated by applying heat energy in a first color recordable energy range and in which the color state of the recording layer then becomes a second color state when the recording layer is heated at a second coloring temperature higher than the first coloring temperature and then cooled, wherein provided that an initial first color recordable energy range of the recording material is (E1) and a changed first color recordable energy range of the recording material which has been preserved at 35.degree. C. for 48 hours while keeping the second color state is (ED), a changing rate (EC) which is represented by the following equation is less than about 35% :EC+{(E1-ED)/E1}.times.100.