A heat-sensitive recording material suitable for offset printing, having a web-shaped substrate, having a front side and a reverse side opposite the front side, a heat-sensitive recording layer disposed at least on one of the two sides of the web-shaped substrate having at least one dye precursor and at least one (color) developer reactive with the dye precursor. The heat-sensitive recording layer has particles including an organic surface whose extent in the direction of the thickness of web-shaped substrate and heat-sensitive recording layer is greater than the thickness of the heat-sensitive recording layer.

A thermal recording medium includes: a transparent base material and a thermal recording layer on the base material. The thermal recording layer contains a dispersant having a carboxyl group and a crosslinking agent including an epichlorohydrin-modified polyamide polyamine resin or an organic compound containing an oxazoline group.

A thermochromic composition including a dye molecule; a matrix, wherein the matrix comprises a material having a defined melting point; and an optional developer. A process for preparing a thermochromic composition, including providing a dye; heating a matrix above its melting point; adding the heated matrix to the dye until the dye dissolves in the matrix; optionally, adding a developer; wherein the thermochromic composition exhibits a first color at a first temperature and a second color at a second temperature; wherein the first color and the second color are different; and wherein the first temperature and the second temperature are different.

A description is given of a heat-sensitive recording material, comprising phenol-free organic color developers, more particularly comprising a color developer mixture comprising phenol-free organic color developers, of a heat-sensitive recording layer and also of a coating composition for producing it, of the use of the heat-sensitive recording material, of the use of an organic color developer of a formula I for improving the resistance of the printed image of a heat-sensitive recording material, and of a method for producing heat-sensitive recording material.

A recording medium includes a support substrate and a recording layer provided on the support substrate. The recording layer contains a color-exhibiting compound having an electron-donating property, a color-developing agent having an electron-accepting property, and a matrix polymer. The color-developing agent contains a compound represented by a specific formula. The matrix polymer contains a polycarbonate resin.

A set of laminates includes an outer laminate and an inner laminate, wherein the outer laminate includes a transparent polymeric support including on a first side of the support a color laser markable layer containing an infrared dye having an absorption maximum λ.sub.max(IR-1) in the infrared region; wherein the inner laminate includes a transparent polymeric support including on, a first side of the transparent polymeric support, a color laser markable layer containing an infrared dye having an absorption maximum λ.sub.max(IR-2) in the infrared region and, on a second side of the transparent polymeric support, a color laser markable layer containing an infrared dye having an absorption maximum λ.sub.max(IR-3) in the infrared region; and the conditions a) and b) are satisfied:
λ.sub.max(IR-1)>λ.sub.max(IR-2)>λ.sub.max(IR-3); and  a)
λ.sub.max(IR-1)>1100 nm and λ.sub.max(IR-3)<1000 nm.  b)

The present invention relates to a thermally printable paper article with an elastomeric underlayer, which imparts improved printing performance.

A color laser markable article includes a color laser markable layer provided on a support, the laser markable layer including an infrared absorbing compound; a leuco-dye; and an acid generating compound, wherein the acid generating compound has a structure according to Formulae (I) or (II): ##STR00001##
wherein R1 and R3 independently represent an optionally substituted alkyl group, an optionally substituted (hetero)cyclic alkyl group, an optionally substituted (hetero)aryl group, an optionally substituted aralkyl group, an optionally substituted alkoxy group, an optionally substituted (hetero)cyclic alkoxy group, or an optionally substituted (hetero)aryl group; R2, R4 and R5 independently represent an optionally substituted alkyl, an optionally substituted (hetero)cyclic alkyl group or an optionally substituted aralkyl group; and R1 and R2, R4 and R5, R3 and R4, and R3 and R5 may represent the necessary atoms to form a ring.

A thermochromic ink composition includes, in a liquid medium, known as solvent, a dispersion of thermochromic microcapsules incorporating at least one leuco-dye and a thermoplastic binder selected from the group containing polyacrylic polyesters, polyurethanes and copolymers thereof. The composition is characterized in that the solvent is aprotic. A a method for producing a card and such a card incorporating at least one thermochromic pattern produced with a thermochromic ink composition are also described.

A heat-sensitive recording material including a web-shaped substrate having a front side and an opposite reverse side, and at least one heat-sensitive recording layer on either or both of the sides of the web-shaped substrate. The heat-sensitive recording layer contains at least one dye precursor at least one salicylic acid derivative as a (color) developer reactive with this at least one dye precursor, and polyvinylpyrrolidone as auxiliary component augmenting the (color) developer the at least one salicylic acid derivative is 3,5-di(α-methylbenzyl)salicylic acid.