A colour laser markable composition includes at least a first and a second Diffusion Hindered Molecular Assembly (DHMA), each including a leuco dye and, respectively, a first and second sensitizer. With the laser markable composition, at least two different colours may be formed in a single layer.

A colour laser markable laminate includes a colour laser markable layer including a leuco dye and an infrared absorbing compound, an optional adhesive layer, a polymeric support, an optional outerlayer, wherein the colour laser markable layer further includes an acid scavenger. The support, the optional adhesive layer, or the optional outer layer includes a UV absorbing compound.

The present invention relates to labels and labelstock materials, and to substances used therein, and components thereof. The present invention further relates to a method of manufacturing the labelstock and labels, uses thereof and products comprising them.

A recording medium capable of reducing a color gamut change is provided. The recording medium includes a plurality of coloring layers and at least one diffusion reduction layer. Each of the coloring layers includes a coloring compound that is electron-donative, a developer that is electron-acceptive, and matrix resin. The diffusion reduction layer is provided between the coloring layers adjacent to each other. The diffusion reduction layer is capable of reducing diffusion of the coloring compound between the coloring layers adjacent to each other during heating of the recording medium.

The present invention relates to a thermal transfer film comprising: a base layer; and a light-to-heat conversion layer which is laminated on top of the base layer and includes a first layer laminated on top of the base layer and a second layer laminated on top of the first layer in the thickness direction, wherein light-to-heat conversion materials are more omnipresent in the first layer than the second layer. The present invention also relates to an organic electroluminescent device prepared using said film.

A thermosensitive recording layer forming liquid includes an electron-donating compound, an electron-accepting compound, and a solvent. A solubility of the electron-accepting compound to 100% ethanol at 20 C. is 5.0% by mass or less.

A laser markable material includes a laser markable layer, present as a self-supporting layer or as a layer on a support, the laser markable layer including an infrared absorbing dye and an infrared absorbing pigment, characterized in that the amount of the infrared absorbing pigment is between 10 ppm and 1000 ppm relative to the total dry weight of the laser markable layer.

Pattern transfer sheets and methods are provided for printing paste patterns (e.g., thin fingers) with a high aspect ratio and for increasing throughput in pattern transfer printing. Trenches in the pattern transfer sheets, that are configured to be filled with printing paste and to enable releasing the printing paste from the trenches onto a receiving substrate upon illumination by a laser beamare coated internally by a coating configured to disintegrate upon the illumination. The coating is configured to enhance the releasing of the pasteincreasing throughput and printing accuracy. The receiving substrate may be cleaned after paste deposition by removing disintegration products of the coating therefrom. Alternatively or complementarily, laser absorbing dye may be mixed into the printing paste to facilitate its release from the trenches.

Systems and methods of permanently marking a material containing an opacification material may include marking the material with a laser system. The laser system may be an ultraviolet system, and the laser may be a solid state diode pumped and pulsed 4 watt to 55 watt unit with a minimum scan speed of 3 meters/second and a minimum frequency of 30 KHz.

The invention is directed towards a composition comprising: a near-infrared radiation absorbing compound; a colour-forming compound; and a heat transfer agent operable to facilitate heat transfer from the near-infrared radiation absorbing compound to the colour-forming compound; wherein the near-infrared radiation absorbing compound is present in an amount of 0.1-3.5 wt % of the total composition, and the heat transfer agent is present in an amount of 1-15 wt % of the total composition, and the heat transfer agent is present in the composition as solid particles. The invention further relates to substrates comprising the composition applied thereto, as well as methods of forming colour or an image on said substrates.