The present invention provides digital printing inks comprising one or more acrylamides. Particularly preferred are inks containing diacetone acrylamide. The inks of the invention show good cure speed, blocking resistance, tack free cure, stability and resistance to blocking, and adhesion to the substrate. The inks of the invention are useful for replacing the currently used inks containing odiferous and toxic components.

The present invention provides digital printing inks comprising one or more acrylamides. Particularly preferred are inks containing diacetone acrylamide. The inks of the invention show good cure speed, blocking resistance, tack free cure, stability and resistance to blocking, and adhesion to the substrate. The inks of the invention are useful for replacing the currently used inks containing odiferous and toxic components.

A conductive ink composition for screen printing contains a conductive metal particle (A) having an oleic acid surfactant, a non-chlorine-based resin composition (B), and an organic solvent (C), wherein the conductive metal particle (A) is contained in an amount of 45 to 70% by weight with respect to the total ink composition, the non-chlorine-based resin composition (B) has a number average molecular weight of 50,000 or more and is contained in an amount of 5 to 15% by weight with respect to the total ink composition, the organic solvent (C) has a flash point of 75 to 110° C. and is contained in an amount of 25 to 50% by weight with respect to the total ink composition, and the ink composition has an ink viscosity of 10 to 25 Pa.Math.s (23° C.) at a shear rate of 100 s.sup.−1.

A conductive ink composition for screen printing contains a conductive metal particle (A) having an oleic acid surfactant, a non-chlorine-based resin composition (B), and an organic solvent (C), wherein the conductive metal particle (A) is contained in an amount of 45 to 70% by weight with respect to the total ink composition, the non-chlorine-based resin composition (B) has a number average molecular weight of 50,000 or more and is contained in an amount of 5 to 15% by weight with respect to the total ink composition, the organic solvent (C) has a flash point of 75 to 110° C. and is contained in an amount of 25 to 50% by weight with respect to the total ink composition, and the ink composition has an ink viscosity of 10 to 25 Pa.Math.s (23° C.) at a shear rate of 100 s.sup.−1.

The present invention provides an inkjet ink and a hiding layer coating agent that contain radical polymerizable components including a polyfunctional monomer that includes a high Tg polyfunctional monomer with a glass transition temperature Tg of not less than 40° C. at a ratio of not less than 30 mass % and a monofunctional monomer, a volatile solvent, and a photo-radical polymerization initiator, with a ratio of the monofunctional monomer being 5 to 70 mass % in the radical polymerizable components and a ratio of the volatile solvent being 50 to 400 mass % with respect to the radical polymerizable components and are excellent in dispersion stability due to not containing (excluding) a white pigment such as titanium oxide, etc., and enable printing of a white or colored character having a high hiding property equivalent to that in a case where the white pigment is contained.

The present invention provides an inkjet ink and a hiding layer coating agent that contain radical polymerizable components including a polyfunctional monomer that includes a high Tg polyfunctional monomer with a glass transition temperature Tg of not less than 40° C. at a ratio of not less than 30 mass % and a monofunctional monomer, a volatile solvent, and a photo-radical polymerization initiator, with a ratio of the monofunctional monomer being 5 to 70 mass % in the radical polymerizable components and a ratio of the volatile solvent being 50 to 400 mass % with respect to the radical polymerizable components and are excellent in dispersion stability due to not containing (excluding) a white pigment such as titanium oxide, etc., and enable printing of a white or colored character having a high hiding property equivalent to that in a case where the white pigment is contained.

A method of forming a digital print on a surface by applying powder of dry ink including colourants on the surface, bonding a part of the dry ink powder to the surface by a digital heating print head such that the digital print is formed by the bonded dry ink colourants and removing non-bonded dry ink from the surface.

A method of forming a digital print on a surface by applying powder of dry ink including colourants on the surface, bonding a part of the dry ink powder to the surface by a digital heating print head such that the digital print is formed by the bonded dry ink colourants and removing non-bonded dry ink from the surface.

The present invention relates to a process of forming electrical conductor on a substrate comprising the steps of a) providing a substrate; b) providing an electrically conductive composition; c) applying said electrically conductive composition to at least one part of said substrate; and d) exposing said electrically conductive composition on the substrate to a near infrared light to form an electrical conductor. NIR light cure provides improved electrical properties of the cured composition without damaging heat sensitive substrates.

The present invention relates to a process of forming electrical conductor on a substrate comprising the steps of a) providing a substrate; b) providing an electrically conductive composition; c) applying said electrically conductive composition to at least one part of said substrate; and d) exposing said electrically conductive composition on the substrate to a near infrared light to form an electrical conductor. NIR light cure provides improved electrical properties of the cured composition without damaging heat sensitive substrates.