A jetting assembly for ejecting a print material includes an actuator for applying a pressure to the print material, and further includes jetting assembly block that defines a pump chamber, a converging part (i.e., a narrowing taper), and a nozzle bore that ends or terminates in a nozzle from which a drop of the print material is ejected. An implementation can further include a throat and a diverging part that, together with the converging part, forms a venturi. The converging part results in an increase in a velocity of the print material and a decrease in pressure as the print material passes an supply port of a supply channel. The decrease in pressure can result in a replacement of at least a portion of the drop volume within the throat or the nozzle bore even before the drop is ejected from the nozzle.

A jetting assembly for ejecting a print material includes an actuator for applying a pressure to the print material, and further includes jetting assembly block that defines a pump chamber, a converging part (i.e., a narrowing taper), and a nozzle bore that ends or terminates in a nozzle from which a drop of the print material is ejected. An implementation can further include a throat and a diverging part that, together with the converging part, forms a venturi. The converging part results in an increase in a velocity of the print material and a decrease in pressure as the print material passes an supply port of a supply channel. The decrease in pressure can result in a replacement of at least a portion of the drop volume within the throat or the nozzle bore even before the drop is ejected from the nozzle.

An inkjet head including a flow path unit and a plurality of actuator units, each of the plurality of actuator units has a parallelogram shape defined by two sets of opposing sides, which is substantially parallel to a first direction and a second direction intersecting with each other along a plane, the side of the actuator unit parallel to the second direction is substantially parallel to that of an adjacent actuator unit and is shifted from that of the adjacent actuator unit in the second direction, the plurality of actuator units are inclined with respect to two contour lines of a flow path unit, the two contour lines being parallel with each other and extending in a longitudinal direction of the flow path unit, and centers of gravity of contours of the plurality of actuator units are arranged on substantially one straight line which is parallel to the contour lines.

An ink-jet ink composition includes: a solvent; a pigment comprising a first powder, the surface of which, in the solvent, bears a first charge; an ionic polymer having a second charge, which is counter to the first charge; and polyvalent ions having the first charge. The ink composition has a surface tension of 53 mN/m or less.

An ink-jet ink composition includes: a solvent; a pigment comprising a first powder, the surface of which, in the solvent, bears a first charge; an ionic polymer having a second charge, which is counter to the first charge; and polyvalent ions having the first charge. The ink composition has a surface tension of 53 mN/m or less.

A method for ink-jet recording comprising recording an image on a recording medium using an ink-jet recording apparatus including a recording head equipped with a heat generation unit which generates thermal energy for discharging aqueous ink by discharging the aqueous ink from the recording head based on image data by action of the thermal energy, wherein the aqueous ink is discharged once by applying a single pulse waveform voltage to the heat generation unit in the recording, and wherein the aqueous ink includes silver particles.

A method for ink-jet recording comprising recording an image on a recording medium using an ink-jet recording apparatus including a recording head equipped with a heat generation unit which generates thermal energy for discharging aqueous ink by discharging the aqueous ink from the recording head based on image data by action of the thermal energy, wherein the aqueous ink is discharged once by applying a single pulse waveform voltage to the heat generation unit in the recording, and wherein the aqueous ink includes silver particles.

The present disclosure includes methods of printing on textiles. The method can include jetting an ink composition onto a fabric substrate. The ink composition can include water, organic co-solvent, pigment, and from 2 wt % to 15 wt % of a sulfonated polyester-polyurethane binder. The method can also include heating the fabric substrate having the ink composition printed thereon to a temperature from 120° C. to 200° C. for a period of 30 seconds to 5 minutes.

The present disclosure includes methods of printing on textiles. The method can include jetting an ink composition onto a fabric substrate. The ink composition can include water, organic co-solvent, pigment, and from 2 wt % to 15 wt % of a sulfonated polyester-polyurethane binder. The method can also include heating the fabric substrate having the ink composition printed thereon to a temperature from 120° C. to 200° C. for a period of 30 seconds to 5 minutes.

A liquid discharge head substrate comprising a liquid discharge element arranged above a surface of a substrate, an insulator arranged between the surface and the liquid discharge element, a liquid supply port extending through the insulator, first and second conductive patterns is provided. The first pattern connects an element arranged on the surface and the liquid discharge element. The second pattern surrounds the liquid supply port. The insulator includes first and second films that are bonded at a bonding surface along the surface. A first member arranged in the first film and a second member arranged in the second film, of the first pattern, are bonded at the bonding surface. A third member arranged in the first film and a fourth member arranged in the second film, of the second pattern, are bonded at the bonding surface.