The invention relates to a self-adhesive, heat-sensitive recording material, comprising a carrier substrate, a heat-sensitive, color-forming layer that is applied on one side of the carrier substrate and contains at least a non-phenolic color developer in and at least one color former, a siliconized layer on the upper side of the heat-sensitive, color-forming layer that is applied on the carrier substrate, as well as an adhesive layer on the side of the carrier substrate facing away from the heat-sensitive, color-forming layer.

A linerless thermal sheet arranged as a roll, includes a substrate having a first face and a second face, whereby the first face opposes the second face; an adhesive layer on at least part of the first face of the substrate; a thermosensitive layer on at least part of the second face of the substrate, the thermosensitive layer including a first portion and a second portion whereby the first portion and the second portion do not overlap; a release coating applied onto the thermosensitive layer, the release coating has a low adherence to the adhesive layer; at least one colour image is deposited on the first portion of the thermosensitive layer such that the at least one colour image is between the thermosensitive layer and the release coating, whereby the second portion of the thermosensitive paper is blank for thermally-printed information.

A recording medium includes a recording layer configured to be able to change a color-developed state by an external stimulus and a plurality of structures provided on the recording layer. The recording layer has a plurality of color-developing portions, and a pitch Δd′ between the color-developing portions and a width W of each of the color-developing portions satisfy a relationship of Δd′>W.

A thermosensitive recording medium includes a support; a first underlayer disposed on or above the support; a second underlayer disposed on or above the first underlayer; and a thermosensitive recording layer disposed on or above the second underlayer. The second underlayer and the thermosensitive recording layer are formed by simultaneous curtain coating. Surface smoothness of a surface of the thermosensitive recording medium is 1,000 s or greater.

Provided is a thermosensitive recording medium being excellent in oil resistance among various performances required for the thermosensitive recording medium, and being further excellent in heat resistance, plasticizer resistance, and printing (recording) run-ability.

That is a thermosensitive recording medium having a thermosensitive recording layer comprising a colorless or pale colored electron donating leuco dye and an electron accepting color developing agent on a substrate, wherein the thermosensitive recording layer contains at least two kinds of urea compounds. The two kinds of urea compounds comprise the first urea compound being represented by the following general formula 1, and the second urea compound being represented by the following general formula 2.

##STR00001##

wherein R.sup.1 represents a substituted or unsubstituted alkyl group, aralkyl group or aryl group, and R.sup.2 represents a hydrogen atom or an alkyl group,

##STR00002##

wherein R.sup.4 to R.sup.8 represent a hydrogen atom, a halogen atom, a nitro group, an amino group, an alkyl group, an alkoxy group, an aryloxy group, and the like, and m represents an integer of 0 to 2.

A heat-sensitive recording material has a web-shaped substrate, having a front side and a reverse side opposite the front side, a heat-sensitive recording layer disposed to the front side of the web-shaped substrate, including at least one dye precursor and at least one (color) developer reactive with this at least one dye precursor. A front-side surface of the heat-sensitive recording material is formed dehesively with respect to layers of adhesive applied to the reverse side of the web-shaped substrate. The dehesive front-side surface includes a furnish which is disposed above the heat-sensitive recording layer and comprises at least one release agent. A diffusion layer is formed between the furnish and the heat-sensitive recording layer. A method for producing a heat-sensitive recording material of this kind, and possibilities for its use.

An object of the present invention is to provide a thermal recording material which is excellent in all of the following characteristics: plasticizer resistance, image stability against moisture and heat, the resistance to background fogging under moisture and heat, and the retention of color developing ability. Provided is a thermal recording material having, on a paper support, a heat-sensitive recording layer containing a colorless or light-colored dye precursor and a developer which reacts with the dye precursor on heating and converts the dye precursor to its colored form, the paper support containing 0.25 to 1.0% by mass of a neutral rosin sizing agent relative to the pulp solid content in combination with calcium carbonate and aluminum sulfate, the developer having a phenylureido moiety in its molecule.

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

A reversible recording medium according to an embodiment of the present disclosure includes a first recording layer to be colored in a first color, a second recording layer to be colored in a second color, the second color being different from the first color, and a first intermediate layer provided between the first recording layer and the second recording layer, the first intermediate layer including a plurality of layers respectively containing materials different from each other.

An ink composition includes a fluid and a plurality of microcapsules suspended in the fluid. The fluid includes a first chemical compound that exhibits a first color characteristic in a first pH range and exhibits a second color characteristic in a second pH range, where the first color characteristic is visually distinct from the second color characteristic. A second chemical compound is contained within the microcapsules, such that rupturing at least a subset of the plurality of microcapsules releases the second chemical compound. Releasing the second chemical compound shifts a pH of the fluid from a first pH in the first pH range to a second pH in the second pH range.