An image forming method includes applying an ink for the first time to a recording medium to form an image and rolling up the recording medium in a roll form, wherein the recording medium is continuous paper, the ink includes water, an organic solvent, and a coloring material, and the image has a tackiness power of from 80 to 110 nN.

A primer composition including a resin emulsion, an aggregation accelerator, a surfactant, and water, the surfactant containing one or more of acetylene-based surfactants and silicone-based surfactants, and a nonionic surfactant other than the surfactant, the nonionic surfactant having an HLB value of 10 or above and below 15.5 and having multiple polyoxyalkylene groups, and the proportion of the nonionic surfactant in the primer composition is 3 mass % or below. The primer composition has excellent storage stability and makes it possible to form a primer layer that has excellent transparency and that produces excellent bleeding resistance and printability when a solid image is printed by an aqueous inkjet ink composition.

The present invention provides a metal oxide dispersion comprises a metal oxide, a millbase and a dispersant. The dispersant in the metal oxide is selected from a group consisting of a phosphoric acid polyester copolymer, a trimethoxysilane compound, a triethoxysilanes compound, dimethylamino ethyl methacrylate (DMAEMA) and a combination thereof, and the dispersion is substantially free of water. The metal oxide dispersion of the invention is useful for manufacturing an inkjet ink to provide a high-quality color image on a contact lens or a mold so as to produce a colored contact lens.

A decorative paper layer may include a base paper layer, an inkjet receiver coating and a pattern formed thereon by digitally applying inks from a set of a plurality of differently colored inks. At least one of the inks may include color pigments having an average particle diameter larger than 150. The inkjet receiver coating may include silica pigments, in which the silica particles are particles of precipitated silica and/or silica gel and/or have an average particle size which is at least 4 times larger than the average particle diameter of the color pigments and/or have an average particle size of 1 to 40 micrometer.

A decorative paper layer may include a base paper layer, an inkjet receiver coating and a pattern formed thereon by digitally applying inks from a set of a plurality of differently colored inks. At least one of the inks may include color pigments having an average particle diameter larger than 150. The inkjet receiver coating may include silica pigments, in which the silica particles are particles of precipitated silica and/or silica gel and/or have an average particle size which is at least 4 times larger than the average particle diameter of the color pigments and/or have an average particle size of 1 to 40 micrometer.

This ink-jet ink (hereinafter, referred to as “ink”) comprises an aqueous solvent, a pigment, and a thixotropic agent, and is characterized by having a viscosity at 25° C. of 15 mPa.Math.s or lower at a shear rate of 1,000 (1/s) and having a viscosity at 25° C. of 150 mPa.Math.s or higher at a shear rate of 1 (1/s) in a state in which the aqueous solvent has been removed therefrom so that the mass of the ink is 80% of the initial mass. This method for forming an image includes an ink delivery step in which droplets of an ink are ejected from an ink-jet head equipped with an ink circulation mechanism and are delivered to a base, and is characterized in that the ink comprises an aqueous solvent, a pigment, and a thixotropic agent, the ink is circulated so that the ink within the ink-jet head has a viscosity of 15 mPa.Math.s or lower, and the ink delivery step is conducted so that the droplets at the time of delivery to the base or immediately after the delivery have a loss in mass from the ink of 20% or less and have a viscosity of 150 mPa.Math.s or higher.

This ink-jet ink (hereinafter, referred to as “ink”) comprises an aqueous solvent, a pigment, and a thixotropic agent, and is characterized by having a viscosity at 25° C. of 15 mPa.Math.s or lower at a shear rate of 1,000 (1/s) and having a viscosity at 25° C. of 150 mPa.Math.s or higher at a shear rate of 1 (1/s) in a state in which the aqueous solvent has been removed therefrom so that the mass of the ink is 80% of the initial mass. This method for forming an image includes an ink delivery step in which droplets of an ink are ejected from an ink-jet head equipped with an ink circulation mechanism and are delivered to a base, and is characterized in that the ink comprises an aqueous solvent, a pigment, and a thixotropic agent, the ink is circulated so that the ink within the ink-jet head has a viscosity of 15 mPa.Math.s or lower, and the ink delivery step is conducted so that the droplets at the time of delivery to the base or immediately after the delivery have a loss in mass from the ink of 20% or less and have a viscosity of 150 mPa.Math.s or higher.

An object is to provide a method for storing or transporting an aqueous white ink composition for inkjet that does not cause precipitation of a pigment therein during storage for a long period or transport, and allows the pigment to be easily redispersed even if precipitation occurs. As means for solving the problems, a storing method is provided that includes placing an aqueous white ink composition for inkjet containing titanium oxide and a pigment dispersant in a tank and maintaining the entire aqueous white ink composition for inkjet in the tank at a temperature of −5 to −35° C.

An object is to provide a method for storing or transporting an aqueous white ink composition for inkjet that does not cause precipitation of a pigment therein during storage for a long period or transport, and allows the pigment to be easily redispersed even if precipitation occurs. As means for solving the problems, a storing method is provided that includes placing an aqueous white ink composition for inkjet containing titanium oxide and a pigment dispersant in a tank and maintaining the entire aqueous white ink composition for inkjet in the tank at a temperature of −5 to −35° C.

Methods for forming latexes are provided. In an embodiment, such a method comprises adding a monomer emulsion comprising water, a monomer, an acidic monomer, a hydrophilic monomer, a difunctional monomer, a first reactive surfactant, and a chain transfer agent, to a reactive surfactant solution comprising water, a second reactive surfactant, and an initiator, at a feed rate over a period of time so that monomers of the monomer emulsion undergo polymerization reactions to form resin particles in a latex. The reactive surfactant solution does not comprise monomers other than the second reactive surfactant, the reactive surfactant solution does not comprise a resin seed, and the monomer emulsion does not comprise the resin seed. The latex is characterized by a viscosity in a range of from about 10 cP to about 100 cP as measured at a solid content of about 30% and at room temperature. The latexes are also provided.