An ink comprising: (a) from 1 to 20 parts of surface treated titanium dioxide; (b) from 20 to 70 parts of viscosity modifier; (c) from 5 to 30 parts of one or more water miscible polar organic solvent(s); (d) from 0.1 to 3 parts of surfactant; (e) from 0.001 to 5 parts of biocide; (f) from 0 to 20 parts of polymer particles; (g) the balance to 100 parts water; wherein the ink has a viscosity in the range of from 10 to 25 mPa.Math.s when measured at 32° C. using a Brookfield spindle SOO at 3 or 12 rpm depending on whether the viscosity is < or >16 mPa.Math.s. Also ink jet printing processes, printed substrates, ink containers and ink-jet printers.

A method for manufacturing an electromagnetic shielding film of reduced thickness and a simplified manufacturing process includes forming a conductive ink layer by inkjet printing, on a component to be shielded, forming an insulative ink layer on the conductive ink layer by inkjet printing, and sintering the conductive ink layer and the insulative ink layer to form an electromagnetic shielding layer and an insulative layer, thereby obtaining the electromagnetic shielding film.

A method for manufacturing an electromagnetic shielding film of reduced thickness and a simplified manufacturing process includes forming a conductive ink layer by inkjet printing, on a component to be shielded, forming an insulative ink layer on the conductive ink layer by inkjet printing, and sintering the conductive ink layer and the insulative ink layer to form an electromagnetic shielding layer and an insulative layer, thereby obtaining the electromagnetic shielding film.

The present invention provides the following process for producing a fine organic pigment which is capable of producing the fine organic pigment that has a very small primary particle size and is excellent in filtering property even in a cleaning step, and a fine organic pigment produced by the process; a process for producing a dispersion using the fine organic pigment, and a dispersion produced by the process; and a process for producing an ink using the dispersion. The present invention relates to [1] a process for producing a fine organic pigment, including steps 1 and 2: step 1: kneading a mixture prepared by compounding a raw material organic pigment, a water-soluble inorganic salt, a water-soluble organic solvent and a compound represented by the following formula (1) with each other, the compound being compounded in an amount of not less than 0.8 part by mass and not more than 18.0 parts by mass on the basis of 100 parts by mass of the raw material organic pigment: R.sup.1O(PO).sub.m(EO).sub.nA (1); and step 2: subjecting the mixture obtained in the step 1 to cleaning treatment with an aqueous solvent and then to filtration, [2] a fine organic pigment produced by the process according to the above aspect [1], [3] a dispersion produced using the fine organic pigment according to the above aspect [2], [4] a process for producing a paste of a fine organic pigment, including the above step 1 and 2, [5] a process for producing a dispersion, including step 3 of subjecting the paste of the fine organic pigment produced by the process according to the above aspect [4], an organic solvent and water to dispersing treatment, and [6] a process for producing an ink, including step 4 of mixing the dispersion produced by the process according to the above aspect [5] with at least one material selected from the group consisting of water and an organic solvent.

The present invention provides the following process for producing a fine organic pigment which is capable of producing the fine organic pigment that has a very small primary particle size and is excellent in filtering property even in a cleaning step, and a fine organic pigment produced by the process; a process for producing a dispersion using the fine organic pigment, and a dispersion produced by the process; and a process for producing an ink using the dispersion. The present invention relates to [1] a process for producing a fine organic pigment, including steps 1 and 2: step 1: kneading a mixture prepared by compounding a raw material organic pigment, a water-soluble inorganic salt, a water-soluble organic solvent and a compound represented by the following formula (1) with each other, the compound being compounded in an amount of not less than 0.8 part by mass and not more than 18.0 parts by mass on the basis of 100 parts by mass of the raw material organic pigment: R.sup.1O(PO).sub.m(EO).sub.nA (1); and step 2: subjecting the mixture obtained in the step 1 to cleaning treatment with an aqueous solvent and then to filtration, [2] a fine organic pigment produced by the process according to the above aspect [1], [3] a dispersion produced using the fine organic pigment according to the above aspect [2], [4] a process for producing a paste of a fine organic pigment, including the above step 1 and 2, [5] a process for producing a dispersion, including step 3 of subjecting the paste of the fine organic pigment produced by the process according to the above aspect [4], an organic solvent and water to dispersing treatment, and [6] a process for producing an ink, including step 4 of mixing the dispersion produced by the process according to the above aspect [5] with at least one material selected from the group consisting of water and an organic solvent.

A liquid composition, including a solvent, for printing with a binary deflected continuous jet printing technique, wherein upon printing the liquid composition form drops that are each: not charged by an electric field, have a zero electric charge, form a dipole under the effect of an electric field, and are then deflected by the electric field. The liquid composition has all the following characteristics: a conductivity at 20° C. from 5 to 500 μS/cm, still preferably a conductivity at 20° C. from 5 to 500 μS/cm, the value of 500 μS/cm being excluded, better a conductivity at 20° C. from 5 to 400 μS/cm, still better a conductivity at 20° C. from 30 to 400 μS/cm, for example from 30 to 200 μS/cm; a dynamic viscosity at 20° C. from 1 to 25 cPs, preferably from 6 to 25 cPs; and a density from 0.8 to 2.5 g/cm3, preferably from 1.2 to 2.5 g/cm3.

A liquid composition, including a solvent, for printing with a binary deflected continuous jet printing technique, wherein upon printing the liquid composition form drops that are each: not charged by an electric field, have a zero electric charge, form a dipole under the effect of an electric field, and are then deflected by the electric field. The liquid composition has all the following characteristics: a conductivity at 20° C. from 5 to 500 μS/cm, still preferably a conductivity at 20° C. from 5 to 500 μS/cm, the value of 500 μS/cm being excluded, better a conductivity at 20° C. from 5 to 400 μS/cm, still better a conductivity at 20° C. from 30 to 400 μS/cm, for example from 30 to 200 μS/cm; a dynamic viscosity at 20° C. from 1 to 25 cPs, preferably from 6 to 25 cPs; and a density from 0.8 to 2.5 g/cm3, preferably from 1.2 to 2.5 g/cm3.

The present invention relates to a solvent-based inkjet ink containing at least a pigment, an organic solvent, a binder resin and a dispersant, wherein the dispersant has a weight average molecular weight (Mw) of at least 5,000 but less than 50,000, an acid value (mgKOH/g) of 5 to 20, and an amine value (mgKOH/g) of 5 to 50. The present invention enables a dispersion of low viscosity and good stability to be generated in an extremely short dispersion time, and is able to provide an inkjet ink which forms an ink coating film that suffers no whitening and has superior resistance (abrasion resistance and alcohol resistance).

The present invention relates to a solvent-based inkjet ink containing at least a pigment, an organic solvent, a binder resin and a dispersant, wherein the dispersant has a weight average molecular weight (Mw) of at least 5,000 but less than 50,000, an acid value (mgKOH/g) of 5 to 20, and an amine value (mgKOH/g) of 5 to 50. The present invention enables a dispersion of low viscosity and good stability to be generated in an extremely short dispersion time, and is able to provide an inkjet ink which forms an ink coating film that suffers no whitening and has superior resistance (abrasion resistance and alcohol resistance).

An overcoating liquid contains a hydrodispersible polyurethane; a compound represented by Chemical formula 1: C.sub.6F.sub.13—CH.sub.2CH.sub.2O(CH.sub.2CH.sub.2O).sub.nH, where n represents an integer of from 1 to 40; a compound represented by Chemical formula 2: HOR.sub.1R.sub.3C—(CH.sub.2).sub.n—CR.sub.2R.sub.4OH, where R.sub.1 and R.sub.2 each, independently represent alkyl groups having three to six carbon atoms, R.sub.3 and R.sub.4 each, independently represent methyl groups or ethyl groups, and n represents an integer of from 1 to 6; and water, wherein the overcoating liquid is applied to the surface of a recording medium onto which inkjet ink is already discharged.