Abstract: A thermal inkjet ink includes a water-based vehicle; a colorant; and a modified siloxane surfactant including a plurality of components. Each component has a chemical formula I: Si(1+x+z)O(1+x+z+y)C(1+1+2(x+z)+j+m+y(2+n))H(6+6+6(x+z)+o+p+y(4+q)). For each component: y ranges from 2 to 4; x and z each range from 0 to 14; x+z=from 0 to 14; j, m, and n are the number of carbon atoms, respectively, in R1, R2, and R3; o, p, and q are the number of hydrogen atoms, respectively, in R1, R2, and R3. R1 is selected from H, an alkyl, and an aryl. Each of R2 and R3 is selected from H, an alkyl, an alkyl substituted with an allylic or an epoxy group, an aryl, and an aryl substituted with an allylic or an epoxy group. For some components: x+z=from 7 to 14.

Abstract: An example of a dye sublimation inkjet ink includes a disperse dye colorant dispersion; a water soluble polymeric ultraviolet (UV) absorber; a co-solvent; and a balance of water. The water soluble polymeric UV absorber of the dye sublimation inkjet ink has absorption at a radiation wavelength ranging from about 360 nm to about 410 nm.

Abstract: An example dye sublimation inkjet ink set includes a first dye sublimation inkjet ink and a second dye sublimation inkjet ink. The first dye sublimation inkjet ink includes a disperse dye colorant dispersion including a first disperse dye having absorption at a radiation wavelength ranging from about 360 nm to about 410 nm; an additive to absorb energy at the radiation wavelength ranging from about 360 nm to about 410 nm and to dissipate at least some of the absorbed energy as fluorescence; a co-solvent; and a balance of water. The additive is selected from the group consisting of a compound containing from 3 to 5 fused benzene rings and and a coumarin derivative. The second dye sublimation inkjet ink includes a disperse dye colorant dispersion including a second disperse dye having less absorption at the radiation wavelength than the first disperse dye; a co-solvent; and a balance of water.

Abstract: Described herein is a liquid electrostatic ink developer assembly comprising a developer roller having a surface coating, the surface coating comprising a polyurethane resin formed from a polyol; a hydroxyl-terminated polysiloxane; and a polyisocyanate. Also, described herein is a liquid electrostatic printing apparatus comprising the liquid electrostatic ink developer assembly.

Abstract: An example of a thermal inkjet fluid composition includes a water soluble photoacid generator having substantially no absorbance at a radiation wavelength ranging from about 360 nm to about 410 nm, a water soluble polymeric sensitizer having absorption at the radiation wavelength ranging from about 360 nm to about 410 nm, a polymeric binder, and a balance of water. The water soluble polymeric sensitizer includes a functionalized aromatic chromophore moiety, a polyether chain, and an amide linkage or an ether linkage attaching one end of the polyether chain to the functionalized aromatic chromophore moiety.

Abstract: The present disclosure relates to cleaning a surface in a printing device, wherein a guiding member directs a stream of cleaning fluid towards the surface; and at least one barrier unit to confine the stream of cleaning fluid to a portion of the surface, wherein the at least one barrier unit guides air to provide at least one air curtain confining said stream of cleaning fluid to the portion of the surface.

Abstract: The present disclosure relates to a liquid electrophotographic ink developer unit. The unit comprises a developer roller comprising a layer formed from a polymer composition containing a conductive filler, whereby the polymer composition has a specific resistivity of less than 1×106 ?·cm. The unit also comprises a secondary roller that co-operates with the developer roller.

Abstract: The present disclosure relates to cleaning a surface in a printing device, wherein a steam guiding member directs a steam flow towards the surface; wherein the steam flow interacts with a substance on said surface to clean a portion of the surface.

Abstract: Herein is described an inkjet printer cartridge, comprising: a printhead having a flow path; a reservoir in fluid communication with the printhead flow path, the reservoir containing an inkjet ink composition; and a shipping fluid present in the printhead flow path, wherein the shipping fluid comprises: a fadable colorant; a carbohydrate; and a liquid vehicle. A method of performing a nozzle check for an inkjet printhead is also described.

Abstract: Herein is described a method of inkijet printing, and compositions and inksets for use in the method, the method comprising: printing onto a non-porous substrate an inkjet fixing composition comprising a cationic polymer in an amount of less than 5 wt. %; an organic acid in an amount of 3 wt. % or less; and a liquid vehicle; and printing a latex-containing inkjet ink composition onto the non-porous substrate.

Abstract: Herein is described an inkjet printer cartridge, comprising: a printhead having a flow path; a reservoir in fluid communication with the printhead flow path, the reservoir containing an inkjet ink composition; and a shipping fluid present in the printhead flow path, wherein the shipping fluid comprises: a fadable colorant; a carbohydrate; and a liquid vehicle. A method of performing a nozzle check for an inkjet printhead is also described.

Abstract: A thermal inkjet ink includes a water-based vehicle; a colorant; and a modified siloxane surfactant including a plurality of components. Each component has a chemical formula I: Si(1+x+z)O(1+x+z+y)C(1+1+2(x+z)+j+m+y(2+n))H(6+6+6(x+z)+o+p+y(4+q)). For each component: y ranges from 2 to 4; x and z each range from 0 to 14; x+z=from 0 to 14; j, m, and n are the number of carbon atoms, respectively, in R1, R2, and R3; o, p, and q are the number of hydrogen atoms, respectively, in R1, R2, and R3. R1 is selected from H, an alkyl, and an aryl. Each of R2 and R3 is selected from H, an alkyl, an alkyl substituted with an allylic or an epoxy group, an aryl, and an aryl substituted with an allylic or an epoxy group. For some components: x+z=from 7 to 14.

Abstract: Described herein is a liquid electrostatic ink developer assembly comprising a developer roller having a surface coating, the surface coating comprising a polyurethane resin formed from a polyol; a hydroxyl-terminated polysiloxane; and a polyisocyanate. Also, described herein is a liquid electrostatic printing apparatus comprising the liquid electrostatic ink developer assembly.

Abstract: Barrier members for use in an electrographic printer are described. The barrier member has a first layer including thermally insulating particles embedded in a polymer composition, and a second layer including a thermally conductive metallic layer.

Abstract: The present disclosure is drawn to pigment dispersions including from 5 wt % to 30 wt % of a pigment having an amide group, a styrene acrylic polymer having a weight average molecular weight from 3,000 Mw to 30,000 Mw and having a weight ratio to the pigment of from 1:1 to 1:10, a lactam co-solvent having a weight ratio to the pigment of from 10:1 to 1:10, and water. The lactam co-solvent can be co-milled with the pigment and an at least 5 wt % portion of the lactam co-solvent can be adsorbed on the pigment via van der waals interaction with the amide group.

Abstract: Examples of optically clear fluid compositions are disclosed herein. In one example, the optically clear fluid composition includes an aqueous vehicle, an anionic polymeric binder dispersed in the aqueous vehicle, and wax particles incorporated in the aqueous vehicle. The anionic polymeric binder has a glass transition temperature (Tg) that is higher than 40 C, and a pH ranging from about 7 to about 11. The wax particles have a particle size ranging from about 25 nm to about 75 nm, and a melting temperature (Tm) ranging from about 100 C to about 150° C. The optically clear fluid composition has a viscosity ranging from about 0.5 centipoise to about 90 centipoise.

Abstract: Herein is described a method of inkijet printing, and compositions and inksets for use in the method, the method comprising: printing onto a non-porous substrate an inkjet fixing composition comprising a cationic polymer in an amount of less than 5 wt. %; an organic acid in an amount of 3 wt. % or less; and a liquid vehicle; and printing a latex-containing inkjet ink composition onto the non-porous substrate.

Abstract: Barrier members for use in an electrographic printer are described. The barrier member has a first layer including thermally insulating particles embedded in a polymer composition, and a second layer including a thermally conductive metallic layer.

Abstract: The present disclosure relates to cleaning a surface in a printing device, wherein a steam guiding member directs a steam flow towards the surface; wherein the steam flow interacts with a substance on said surface to clean a portion of the surface.

Abstract: The present disclosure relates to a liquid electrophotographic ink developer unit. The unit comprises a developer roller comprising a layer formed from a polymer composition containing a conductive filler, whereby the polymer composition has a specific resistivity of less than 1×106 ?·cm. The unit also comprises a secondary roller that co-operates with the developer roller.