An exemplary printable composition comprises a liquid or gel suspension of a plurality of metallic nanofibers or nanowires; a first solvent; and a viscosity modifier, resin, or binder. In various embodiments, the metallic nanofibers are between about 10 microns to about 100 microns in length, are between about 10 nm to about 120 nm in diameter, and are typically functionalized with a coating or partial coating of polyvinyl pyrrolidone or a similar compound. An exemplary metallic nanofiber ink which can be printed to produce a substantially transparent conductor comprises a plurality of metallic nanofibers; one or more solvents such as 1-butanol, ethanol, 1-pentanol, n-methylpyrrolidone, cyclohexanone, cyclopentanone, 1-hexanol, acetic acid, cyclohexanol, or mixtures thereof; and a viscosity modifier, resin, or binder such as polyvinyl pyrrolidone or a polyimide, for example.

An aqueous UV curable inkjet ink includes an aqueous medium, and capsules composed of a polymeric shell surrounding a core containing one or more polymerizable compounds having an alkyne group or an ethylenically unsaturated group, wherein the aqueous UV curable inkjet ink contains one or more photoinitiators and one or more thiol compounds having at least two thiol groups.

An aqueous UV curable inkjet ink includes an aqueous medium, and capsules composed of a polymeric shell surrounding a core containing one or more polymerizable compounds having an alkyne group or an ethylenically unsaturated group, wherein the aqueous UV curable inkjet ink contains one or more photoinitiators and one or more thiol compounds having at least two thiol groups.

The present invention relates to security elements, comprising (a) a substrate, (b) on at least part of the substrate surface a metal layer, (c) optionally on at least part of the metal layer a dielectric layer, (d) on at least part of the metal layer, or the dielectric layer, a layer obtained by overcoating the metal layer, or the dielectric layer with a composition, comprising (i) silver nanoparticles, (ii) a solvent, (iii) (surface) stabilizing agent(s) and (iv) optionally a binder, and (e) a protective layer on top of layer (d). The maximum absorption wavelength of the silver nanoparticles in layer (d) is controlled by the amount of (surface) stabilizing agent(s) and optionally binder relative to the amount of silver nanoparticles to be preferably in the range of 700 to 1600 nm.

The present invention relates to security elements, comprising (a) a substrate, (b) on at least part of the substrate surface a metal layer, (c) optionally on at least part of the metal layer a dielectric layer, (d) on at least part of the metal layer, or the dielectric layer, a layer obtained by overcoating the metal layer, or the dielectric layer with a composition, comprising (i) silver nanoparticles, (ii) a solvent, (iii) (surface) stabilizing agent(s) and (iv) optionally a binder, and (e) a protective layer on top of layer (d). The maximum absorption wavelength of the silver nanoparticles in layer (d) is controlled by the amount of (surface) stabilizing agent(s) and optionally binder relative to the amount of silver nanoparticles to be preferably in the range of 700 to 1600 nm.

A sticky-layer-cleaner for removing residues adhered to a sticky flat layer includes a receptacle for a cleaning-liquid and a cleaning-roll in contact with the sticky flat layer, wherein the cleaning-roll includes an elongated carpet fabric which is helically folded around the cleaning-roll and a pile of which includes yarn tufts in loop and/or cut configuration, and the cleaning-roll further includes a helical channel along the length of the folded carpet fabric for draining the cleaning-liquid from the cleaning-roll and/or for wetting the cleaning-roll with the cleaning-liquid.

A sticky-layer-cleaner for removing residues adhered to a sticky flat layer includes a receptacle for a cleaning-liquid and a cleaning-roll in contact with the sticky flat layer, wherein the cleaning-roll includes an elongated carpet fabric which is helically folded around the cleaning-roll and a pile of which includes yarn tufts in loop and/or cut configuration, and the cleaning-roll further includes a helical channel along the length of the folded carpet fabric for draining the cleaning-liquid from the cleaning-roll and/or for wetting the cleaning-roll with the cleaning-liquid.

A conductive ink composition includes metallic nanoparticles, a first non-aqueous polar protic solvent, and a second non-aqueous polar protic solvent. The metallic nanoparticles can be silver nanoparticles. The silver nanoparticles can have an average particle size in a range of 20 nm to 80 nm. Polyvinylpyrrolidone is present on the metallic nanoparticle surfaces. The first solvent has a boiling point of at least 110° C. and a viscosity of at least 10 cP at 25° C. The second solvent has a boiling point of at least 200° C. and a viscosity of at least 100 cP at 25° C. The conductive ink composition contains the metallic nanoparticles in a range of 10 wt %to 75 wt %. The concentration of the second solvent in the conductive ink composition is 11.0% by volume or greater.

A conductive ink composition includes metallic nanoparticles, a first non-aqueous polar protic solvent, and a second non-aqueous polar protic solvent. The metallic nanoparticles can be silver nanoparticles. The silver nanoparticles can have an average particle size in a range of 20 nm to 80 nm. Polyvinylpyrrolidone is present on the metallic nanoparticle surfaces. The first solvent has a boiling point of at least 110° C. and a viscosity of at least 10 cP at 25° C. The second solvent has a boiling point of at least 200° C. and a viscosity of at least 100 cP at 25° C. The conductive ink composition contains the metallic nanoparticles in a range of 10 wt %to 75 wt %. The concentration of the second solvent in the conductive ink composition is 11.0% by volume or greater.

The present invention provides a water-based ink comprising nanopigment micelles, said nanopigment micelles comprising a pigment particle and a polymeric dispersing agent around said pigment particle, whereby said pigment particles have an average particle size between 100 nm and 250 nm. The invention also relates to a printed textile and a dyeing and printing process using said water-based ink.