The present application is drawn to infrared reflective ink formulations, infrared reflective dried coatings prepared from such inks, and IR-reflective substrates and adhesive tapes prepared from such inks and coatings. The inks are suitable for printing by gravure or flexo methods onto polymeric substrates such as PET, paper, or other substrate materials. The coatings are reflective in the near-infrared range. The coatings and tapes are well suited for use in manufacturing methods. The coatings and/or the tapes are ultrathin, on the order of a few micrometers, making them attractive for use in different industrial applications.

A digital printing ink including chitosan, a surfactant, and a balance of a solvent is provided. The chitosan has a weight-average molecular weight of 200,000 to 300,000. The surfactant includes a polyglycol, an ethylene oxide, or a combination thereof. The digital printing ink has a viscosity of 2 cps to 12 cps, a surface tension of 28 dyne/cm to 40 dyne/cm, and a pH value of 6 to 8. A content of the chitosan is 5 wt. % to 10 wt. %, and a content of the surfactant is 2 wt. % to 5 wt. %, based on the total weight of the digital printing ink.

A digital printing ink including chitosan, a surfactant, and a balance of a solvent is provided. The chitosan has a weight-average molecular weight of 200,000 to 300,000. The surfactant includes a polyglycol, an ethylene oxide, or a combination thereof. The digital printing ink has a viscosity of 2 cps to 12 cps, a surface tension of 28 dyne/cm to 40 dyne/cm, and a pH value of 6 to 8. A content of the chitosan is 5 wt. % to 10 wt. %, and a content of the surfactant is 2 wt. % to 5 wt. %, based on the total weight of the digital printing ink.

The present invention relates to a non-aqueous ink composition containing (a) a polythiophene containing a repeating unit complying with formula (I); (b) metal oxide nanoparticles containing at least (b-1) a first metal oxide nanoparticle having an average primary particle diameter d.sub.1 and (b-2) a second metal oxide nanoparticle having an average primary particle diameter d.sub.2, wherein d.sub.1<d.sub.2; and (c) a liquid carrier containing one or more organic solvents, as well as a pile-up suppressor and a lifetime extension agent for an organic EL device, containing metal oxide nanoparticles containing at least the (b-1) and (b-2) described above, wherein d.sub.1<d.sub.2.

The invention provides a process for producing a printed article wherein a deposit liquid is provided to a substrate together with a carrier liquid. Also provided is a printed article obtained or obtainable by the process of the invention, such as a printed article. The invention further provides an apparatus suitable for carrying out the process of the invention, comprising devices configured to provide a flow of each of the deposit liquid and carrier liquid to a substrate, a flow channel for carrying each of the said liquids and an aperture through which at least the deposit liquid must pass. In some embodiments, the process of the invention is performed using the apparatus of the invention. The invention therefore also provides the use of the apparatus of the invention to perform the process of the invention.

Described herein are water-based inks that comprise water, a water miscible solvent having a boiling point of about 56 C. to about 98 C., and a latex. In one aspect, the water miscible solvent comprises about 10 wt % to about 30 wt % of the ink (based on the total weight of the ink). In another aspect, the latex is an alcohol-tolerant latex that exhibits limited or no particle size increase in the presence of alcohol. Further described herein are articles printed with the inks, and methods of printing with the inks.

Described herein are water-based inks that comprise water, a water miscible solvent having a boiling point of about 56 C. to about 98 C., and a latex. In one aspect, the water miscible solvent comprises about 10 wt % to about 30 wt % of the ink (based on the total weight of the ink). In another aspect, the latex is an alcohol-tolerant latex that exhibits limited or no particle size increase in the presence of alcohol. Further described herein are articles printed with the inks, and methods of printing with the inks.

The present invention relates to the use of specific naphthalocyanine chromophores with different axial substituents as almost colourless IR absorbers for security printing applications.

The present invention relates to the use of specific naphthalocyanine chromophores with different axial substituents as almost colourless IR absorbers for security printing applications.

Aqueous particle-free fluids can be used in inkjet printing methods including continuous inkjet printing processes. Each of these fluids has a dynamic viscosity of less than or equal to 5 centipoise (5 mPa-sec) at 25 C., and each consists essentially of: a composition consisting of one or more compounds represented by the following Structure (I):
HOCH.sub.2CH.sub.2R (I)
wherein R is a substituted or unsubstituted phenyl group or a substituted or unsubstituted phenoxy group, in a total amount of at least 0.5 weight % and up to and including 2 weight %, based on the total weight of the aqueous inkjet ink composition. Such aqueous particle-free fluids can be used as replenishment or printhead maintenance fluids.