The present invention provides water-based ink and coating compositions comprising greater than 70 wt % natural materials. The ink and coating compositions of the present invention are suitable for printing on feminine care products, baby care products, and other personal care products.

An inkjet recording apparatus includes a heater and a recording head. The heater is disposed upstream of the recording head in terms of a conveyance direction of a recording medium. The recording medium heated by the heater has a temperature of from 40 to 80° C. The ink contains a pigment, a cellulose derivative, first and second water-soluble organic solvents, and water. The first water-soluble organic solvent is glycol ether. The second water-soluble organic solvent is a water-soluble organic solvent that is not glycol ether. The cellulose derivative has a percentage content of from 0.01 to 0.20% by mass relative to the mass of the ink. The percentage content of the glycol ether is from 6 to 24% by mass relative to the mass of the ink and from 20 to 80% by mass relative to the total mass of the first water-soluble organic solvent and the second water-soluble organic solvent.

A flake-less molecular ink suitable for printing (e.g. screen printing) conductive traces on a substrate has 30-60 wt % of a C.sub.8-C.sub.12 silver carboxylate and 0.1-10 wt % of a polymeric binder, or 5-75 wt % of bis(2-ethyl-1-hexylamine) copper (II) formate, bis(octylamine) copper (II) formate or tris(octylamine) copper (II) formate and 0.25-10 wt % of a polymeric binder, and balance of at least one organic solvent, wherein the binder has ethyl cellulose, and the ethyl cellulose has an average weight molecular weight in a range of 60,000-95,000 g/mol and a bimodal molecular weight distribution.

A flake-less molecular ink suitable for printing (e.g. screen printing) conductive traces on a substrate has 30-60 wt % of a C.sub.8-C.sub.12 silver carboxylate and 0.1-10 wt % of a polymeric binder, or 5-75 wt % of bis(2-ethyl-1-hexylamine) copper (II) formate, bis(octylamine) copper (II) formate or tris(octylamine) copper (II) formate and 0.25-10 wt % of a polymeric binder, and balance of at least one organic solvent, wherein the binder has ethyl cellulose, and the ethyl cellulose has an average weight molecular weight in a range of 60,000-95,000 g/mol and a bimodal molecular weight distribution.

A fluorescent oxygen sensing ink includes at least one organic solvent, at least one polymer binder disposed in the organic solvent, and an oxygen-sensitive fluorescent dye disposed in the organic solvent. The oxygen-sensitive fluorescent dye and the at least one polymer can interact to form a moisture-resistant film. The fluorescent oxygen sensing ink can be incorporated into an oxygen sensing wound dressing.

A fluorescent oxygen sensing ink includes at least one organic solvent, at least one polymer binder disposed in the organic solvent, and an oxygen-sensitive fluorescent dye disposed in the organic solvent. The oxygen-sensitive fluorescent dye and the at least one polymer can interact to form a moisture-resistant film. The fluorescent oxygen sensing ink can be incorporated into an oxygen sensing wound dressing.

The present invention relates to formulations of ink based on nanoparticles of silver and of metal oxides. In particular, the present invention relates to formulations of ink based on nanoparticles of silver and of metal oxides, said inks being stable, having improved conductivity and making it possible to advantageously form electrodes and/or conductive tracks that are particularly suitable for photovoltaic cells, for example on a silicon and/or glass substrate.

A method of printing with coffee-based ink comprises providing a thermal ink-jet cartridge having a quantity of a coffee-based ink disposed within; receiving optical density data from a user via a touch-screen computerized interface, where the data describes an optical density of the coffee-based ink present within an ink-jet pod; and computing a customized droplet-size for the coffee-based ink in its current state within the thermal ink-jet cartridge. A suitable printing apparatus can include coffee-based ink in a cartridge, an image-processing system, an image processing module for determining, inter alia, droplet size and missing/defective nozzles, and a nozzle-compensation module. Suitable ink formulations are human-edible and aqueous.

A method of printing with coffee-based ink comprises providing a thermal ink-jet cartridge having a quantity of a coffee-based ink disposed within; receiving optical density data from a user via a touch-screen computerized interface, where the data describes an optical density of the coffee-based ink present within an ink-jet pod; and computing a customized droplet-size for the coffee-based ink in its current state within the thermal ink-jet cartridge. A suitable printing apparatus can include coffee-based ink in a cartridge, an image-processing system, an image processing module for determining, inter alia, droplet size and missing/defective nozzles, and a nozzle-compensation module. Suitable ink formulations are human-edible and aqueous.

Fusing nanowire inks are described that can also comprise a hydrophilic polymer binder, such as a cellulose based binder. The fusing nanowire inks can be deposited onto a substrate surface and dried to drive the fusing process. Transparent conductive films can be formed with desirable properties.