Thermosensitive recording medium and method of manufacturing the same

A method of manufacturing a thermosensitive recording medium for recording an image thereon by a thermal recording apparatus, the method comprising:

• forming a porous ink receptive layer on a substrate, said porous ink receptive layer containing a pigment as its main component and a binder resin;
• forming an auxiliary coloring layer over said thermosensitive coloring layer, the auxiliary coloring layer containing at least one of an electron-accepting compound and a sensitizer that contributes to improving thermal sensitivity of said thermosensitive coloring layer;
• and
• forming a thermosensitive coloring layers integrally with said ink receptive layer by impregnating said ink receptive layer by means of a printing process using a printing plate with a water-dispersion thermosensitive ink that has been prepared by dispersing in water dispersion components including at least an electron-accepting compound and an electron-donating compound,
• wherein an average particle size of said pigment is greater than an average particle size of particles within said dispersion components in said water-dispersion thermosensitive ink.

A thermosensitive recording medium for recording an image thereon by a thermal recording apparatus, comprising:

• a substrate;
• a porous ink receptive layer formed on a surface of said substrate, said ink receptive layer containing a pigment as its main component, a binder resin, and an electron-accepting compound, said pigment in said ink receptive layer is a porous pigment formed by a flocculated mass of primary particles thereof;
• and
• a thermosensitive coloring layer formed integrally with said ink receptive layer by impregnating said ink receptive layer with a water-dispersion ink that has been prepared by dispersing in water a dispersion component including at least an electron-donating compound, the thermosensitive coloring layer developing a color,
• wherein an average particle size of said pigment is greater than an average particle size of particles within said dispersion components in said water-dispersion ink.

A method of manufacturing a thermosensitive recording medium for recording an image thereon by a thermal recording apparatus, the method comprising:

• forming a porous ink receptive layer on a substrate, said porous ink receptive layer containing a pigment as its main component, a binder resin, and an electron-accepting compound;
• forming an auxiliary coloring layer over the thermosensitive coloring layer, the auxiliary coloring layer containing at least one of an electron-accepting compound and a sensitizer that contributes to improving thermal sensitivity of the thermosensitive coloring layer;
• and
• forming a thermosensitive coloring layer integrally with said ink receptive layer by impregnating said ink receptive layer by means of a printing process using a printing plate with a water-dispersion ink that has been prepared by dispersing in water a dispersion component including at least an electron-donating compound,
• wherein an average particle size of said pigment is greater than an average particle size of particles within said dispersion component in said water-dispersion ink.

A thermosensitive recording medium for recording an image thereon by a thermal recording apparatus, comprising:

• a substrate;
• a porous ink receptive layer formed on a surface of said substrate containing a pigment as its main component, a binder resin, and an electron-accepting compound, said pigment in said ink receptive layer is a porous pigment formed by a flocculated mass of primary particles thereof;
• and
• a thermosensitive coloring layer formed integrally with said ink receptive layer by impregnating said ink receptive layer with a water-dispersion thermosensitive ink that has been prepared by dispersing in water dispersion components including at least an electron-accepting compound and an electron-donating compound, the thermosensitive coloring layer developing a color,
• wherein an average particle size of said pigment is greater than an average particle size of particles within said dispersion components in said water-dispersion thermosensitive ink.

A method of manufacturing a thermosensitive recording medium for recording an image thereon by a thermal recording apparatus, the method comprising:

• forming a porous ink receptive layer on a substrate, said porous ink receptive layer containing a pigment as its main component, a binder resin, and an electron-accepting compound;
• forming an auxiliary coloring layer over the thermosensitive coloring layer, the auxiliary coloring layer containing at least one of an electron-accepting compound and a sensitizer that contributes to improving thermal sensitivity of the thermosensitive coloring layer;
• and
• forming a thermosensitive coloring layer integrally with said ink receptive layer by impregnating said ink receptive layer by means of a printing process using a printing plate with a water-dispersion thermosensitive ink that has been prepared by dispersing in water dispersion components including at least an electron-accepting compound and an electron-donating compound,
• wherein an average particle size of said pigment is greater than an average particle size of particles within said dispersion components in said water-dispersion thermosensitive ink.

A thermosensitive recording medium for recording an image thereon by a thermal recording apparatus, comprising:

• a substrate;
• an ink receptive layer containing a pigment and binder resin formed on a surface of said substrate;
• a thermosensitive coloring layer formed integrally with said ink receptive layer by impregnating said ink receptive layer with a water-dispersion ink that has been prepared by dispersing in water a dispersion component including at least an electron-donating compound;
• and
• an auxiliary coloring layer provided over said thermosensitive coloring layer, the auxiliary coloring layer containing at least an electron-accepting compound, the thermosensitive coloring layer developing a color.

A method of manufacturing a thermosensitive recording medium for recording an image thereon by a thermal recording apparatus, the method comprising:

• forming an ink receptive layer containing a pigment and a binder resin on a substrate;
• forming a thermosensitive coloring layer integrally with said ink receptive layer by impregnating said ink receptive layer by means of a printing process using a printing plate with a water-dispersion ink that has been prepared by dispersing in water a dispersion component including at least an electron-donating compound;
• and
• forming an auxiliary coloring layer containing at least an electron-accepting compound over the thermosensitive coloring layer.