An image forming apparatus comprising a thermal printhead and a controller. The thermal printhead has heating elements. The controller is to receive an indicated print mode corresponding to a type of thermal medium to be used, determine a power profile based on the indicated print mode, and control power to be delivered to the thermal printhead based on the determined power profile.

Example implementations relate to adjust sharpness parameters. In some examples, a printing device can include a processing resource and a memory resource storing non-transitory machine-readable instructions to cause the processing resource to receive print data comprising color channels corresponding to print pixels to be formed on a multi-layer thermally activated print medium, determine a characteristic of a corresponding layer of the multi-layer thermally activated print medium for color channels of the received print data, adjust sharpness parameters of the color channels based on the determined characteristic of the corresponding layer of the multi-layer thermally activated print medium, and cause a print head of the printing device to apply thermal energy to an area of the multi-layer thermally activated print medium including the print pixels using the adjusted sharpness parameters.

A method is disclosed. According to some examples, the method comprises determining, by processing circuitry, a first element set to be associated with a print addressable location, the first element set comprising a first plurality of elements, wherein each element of the first plurality of elements identifies a print colorant or print colorant combination and is associated with a probability that the print colorant or print colorant combination identified by that element is to be applied to the associated print addressable location. The method may comprise determining, by processing circuitry, a second element set to be associated with the print addressable location, the second element set comprising a second plurality of elements, wherein each element of the second plurality of elements identifies a print agent or print agent combination and is associated with a probability that the print agent or print agent combination identified by that element is to be applied to the associated print addressable location. The method may comprise determining, by processing circuitry, a combined element set based on the first element set and the second element set. An apparatus and a machine-readable medium are also disclosed.

Proposed is a dye-sublimation printer, and more particularly to a dye-sublimation printer that can systematically control upward and downward movements of a pick-up roller, upward and downward movements of a platen roller, and driving of a take-up reel gear according to forward and backward movements of a slide plate.

Proposed is a dye-sublimation printer, and more particularly to a dye-sublimation printer that can systematically control upward and downward movements of a pick-up roller, upward and downward movements of a platen roller, and driving of a take-up reel gear according to forward and backward movements of a slide plate.

A moire occurrence prediction means that predicts a region in which moire will occur and implements a moire suppression process only on a pattern including said region, thereby minimizing print deterioration, suppressing the occurrence of moire, and enabling high quality printing. The moire occurrence prediction means includes a communication unit for receiving an input image; a periodic structure inclusion determination unit for determining, in the input image; a periodic structure region that includes a periodic structure that induces occurrence of a moire; and a moire prediction unit for determining a risk of moire occurrence in each periodic structure region by performing a predetermined frequency analysis process with respect to each of the determined periodic structure regions, generating a moire occurrence notification that indicates the risk for each periodic structure region, and outputting the moire occurrence notification.

A substrate thermal sensitive system for creating a latent image that is useful as a scratch-off ticket that comprises a substrate and a first layer that is superimposed on the substrate. The first layer contains a plurality of microcapsules with a dye precursor or a solvent. The microcapsules are configured to rupture from pressure. The substrate thermal sensitive system further has an acidic developer layer coated over the first layer and containing a co-reactant. Particles of the co-reactant are coated with a meltable material, which is configured to melt when the heat is applied. The system further may include a scratch-off layer coated over the acidic developer layer. The system is configured such that when the meltable material is melted by the thermal printing device and the microcapsules are ruptured, the co-reactant of acidic developer layer reacts with the dye or the solvent of the first layer to develop color.

A substrate thermal sensitive system for creating a latent image that is useful as a scratch-off ticket that comprises a substrate and a first layer that is superimposed on the substrate. The first layer contains a plurality of microcapsules with a dye precursor or a solvent. The microcapsules are configured to rupture from pressure. The substrate thermal sensitive system further has an acidic developer layer coated over the first layer and containing a co-reactant. Particles of the co-reactant are coated with a meltable material, which is configured to melt when the heat is applied. The system further may include a scratch-off layer coated over the acidic developer layer. The system is configured such that when the meltable material is melted by the thermal printing device and the microcapsules are ruptured, the co-reactant of acidic developer layer reacts with the dye or the solvent of the first layer to develop color.

A liquid discharge head is configured to achieve decrease in temperature difference in the liquid discharge head, and includes a recording device including the liquid discharge head. The liquid discharge head includes a channel member having a plurality of discharge holes, a plurality of pressurization chambers, and a plurality of common channels, and a plurality of pressurizing parts. The plurality of common channels extends in a first direction and configures a common channel group aligned in a second direction crossing the first direction, the common channels are connected with the plurality of pressurization chambers disposed along the common channels among the plurality of pressurization chambers, and the channel member is disposed outside, in the second direction, with respect to the common channel group, and further includes a first end channel extending in the first direction, and the first end channel is lower in channel resistance than the common channels.

A recording medium according to an embodiment includes a base material; a first color developing layer that is laminated on the base material, and absorbs light having a given wavelength to develop a color; a photothermal conversion layer that is laminated closer to an incident side of the light than the first color developing layer, transmits visible light, and absorbs the light for photothermal conversion; and a second color developing layer that is laminated closer to the incident side of the light than the first color developing layer, transmits visible light and the light, and develops a color by heat converted by the photothermal conversion layer.