An ink jet method includes an ejecting step of ejecting a radiation-curable ink jet composition from an ink jet head and an irradiating step of irradiating the ejected radiation-curable ink jet composition with an ultraviolet ray at an irradiation intensity of 3 to 10 W/cm.sup.2 by using a light emitting diode. The radiation-curable ink jet composition contains monofunctional monomers including a nitrogen-containing monofunctional monomer. The amount of the nitrogen-containing monofunctional monomer relative to the total amount of the radiation-curable ink jet composition is 5 to 40 mass %.

An ink jet method includes an ejecting step of ejecting a radiation-curable ink jet composition from an ink jet head and an irradiating step of irradiating the ejected radiation-curable ink jet composition with an ultraviolet ray at an irradiation intensity of 3 to 10 W/cm.sup.2 by using a light emitting diode. The radiation-curable ink jet composition contains monofunctional monomers including a nitrogen-containing monofunctional monomer. The amount of the nitrogen-containing monofunctional monomer relative to the total amount of the radiation-curable ink jet composition is 5 to 40 mass %.

The invention discloses a decoration apparatus for decorating a web of labeling material. The decoration apparatus comprises conveyor for advancing the web of labeling material between a first station and a second station, an activation unit adapted to apply an activation energy at a activation station for selectively activating activatable pigments comprised in the web of labeling material or to locally ablate the web of labeling material and a temperature-conditioning unit which is adapted to actively cool and/or heat the web of labeling material, in particular, in use, prior, during and/or after selectively activating the activatable pigments or ablating the web of labeling material.

According to some examples in the disclosure, a method may comprise providing a first stream of discrete volumes of material; and directing a pulsed laser beam at a first discrete volume of material in the first stream of discrete volumes of material so as to interact with the first discrete volume of material and thereby displace the first discrete volume away from the first stream. An apparatus and a system are also disclosed.

A radiation-curable ink jet composition comprises a polymerizable compound component including a monofunctional monomer component and a multifunctional monomer component. The content of the monofunctional monomer component is 87 mass % or more based on the total amount of the polymerizable compound component, the monofunctional monomer component includes a monofunctional acrylate containing a polycyclic hydrocarbon group, and the weighted average of the glass transition temperatures of homopolymers of the respective polymerizable compounds is 42° C. or more when the mass ratios of the contents of the respective polymerizable compounds are weighted.

A radiation-curable ink jet composition comprises a polymerizable compound component including a monofunctional monomer component and a multifunctional monomer component. The content of the monofunctional monomer component is 87 mass % or more based on the total amount of the polymerizable compound component, the monofunctional monomer component includes a monofunctional acrylate containing a polycyclic hydrocarbon group, and the weighted average of the glass transition temperatures of homopolymers of the respective polymerizable compounds is 42° C. or more when the mass ratios of the contents of the respective polymerizable compounds are weighted.

A liquid discharge apparatus includes: a discharge head; an ultraviolet irradiator disposed at a position different from the discharge head in a first direction; a carriage configured to scan in the first direction; and a controller configured to: control the carriage and the discharge head to execute a first discharge process of discharging the ink on a predefined printing area of the recording medium in a first scan; after the first discharge process, control the carriage and the discharge head to execute a second discharge process of discharging the ink on the predefined printing area in a second scan; after the second discharge process, control the carriage and the ultraviolet irradiator to irradiate the ink discharged on the predefined printing area with the ultraviolet light in a third scan.

A liquid discharge apparatus includes: a discharge head; an ultraviolet irradiator disposed at a position different from the discharge head in a first direction; a carriage configured to scan in the first direction; and a controller configured to: control the carriage and the discharge head to execute a first discharge process of discharging the ink on a predefined printing area of the recording medium in a first scan; after the first discharge process, control the carriage and the discharge head to execute a second discharge process of discharging the ink on the predefined printing area in a second scan; after the second discharge process, control the carriage and the ultraviolet irradiator to irradiate the ink discharged on the predefined printing area with the ultraviolet light in a third scan.

The technology disclosed relates to accommodating embedded substrates during direct writing onto a printed circuit board and to other patterning problems that benefit from an extended depth of focus. In particular, it relates to multi-focus direct writing of a workpiece by the continuous or step-wise movement of the workpiece during the sequence of exposures having different focus planes. In one implementation, a multi-arm rotating direct writer is configured for interleaved writing focused on two or more focal planes that generally correspond to two or more surface heights of a radiation sensitive layer that overlays the uneven workpiece. Alternating arms can produce interleaved writing to the two or more focal planes.

The technology disclosed relates to accommodating embedded substrates during direct writing onto a printed circuit board and to other patterning problems that benefit from an extended depth of focus. In particular, it relates to multi-focus direct writing of a workpiece by the continuous or step-wise movement of the workpiece during the sequence of exposures having different focus planes. In one implementation, a multi-arm rotating direct writer is configured for interleaved writing focused on two or more focal planes that generally correspond to two or more surface heights of a radiation sensitive layer that overlays the uneven workpiece. Alternating arms can produce interleaved writing to the two or more focal planes.