Provided is a magnetic toner having a toner particle containing a binder resin and a magnetic body, wherein the binder resin contains a polymer A having a first monomer unit and a second monomer unit, the first polymerizable monomer is at least one selected from the group consisting of the (meth)acrylic acid esters having C.sub.18-36 alkyl groups, a content of the first monomer unit and a content of the second monomer unit based on the total moles of all monomer units in the polymer A are respectively 5.0 to 60.0 mol % and 20.0 to 95.0 mol %, and assuming that an SP value of the first monomer unit and the second monomer unit are taken as SP.sub.11 (J/cm.sup.3).sup.0.5 and SP.sub.21(J/cm.sup.3).sup.0.5, respectively, 3.00(SP.sub.21SP.sub.11)25.00 is satisfied, and an oil absorption of the magnetic body is 5 to 40 ml/100 g.

Provided is a two-component developer has a toner including a toner particle including a binder resin, and a magnetic carrier, wherein the binder resin includes a polymer A having a first monomer unit derived from a first polymerizable monomer, and a second monomer unit derived from a second polymerizable monomer different from the first polymerizable monomer, the first polymerizable monomer is a specific (meth)acrylic acid ester, a content and an SP value of the first and second monomer units in the polymer A fall within respective specific ranges, the magnetic carrier has a magnetic core and a coating resin of the surface of the magnetic core, the coating resin includes a polymer B having monomer units (a) and (b), each SP value of the monomer units (a) and (b) is a specific value.

Novel support material formulations, characterized as providing a cured support material with improved dissolution rate, while maintaining sufficient mechanical strength, are disclosed. The formulations comprise a water-miscible non-curable polymer, a first water-miscible, curable material and a second, water-miscible material that is selected capable of interfering with intermolecular interactions between polymeric chains formed upon exposing the first water-miscible material to curing energy. Methods of fabricating a three-dimensional object, and a three-dimensional object fabricated thereby are also disclosed.

The present invention provides an electrophotographic toner binder containing, as a main component, a polymer whose constituent monomer is a monomer having an ethylenically unsaturated bond, the electrophotographic toner binder being excellent in low-temperature fixability, hot-offset resistance, and storage stability. The present invention provides an electrophotographic toner binder containing a polymer (A) containing a monomer (a) and a monomer (x) different from the monomer (a) as essential constituent monomers, wherein the monomer (a) is a (meth)acrylate having a C18-C36 acyclic hydrocarbon group, the polymer (A) has an acid value of 40 or less, and the polymer (A) satisfies the following relational expression (1):
1.1 (cal/cm.sup.3).sup.0.5|SP(x)SP(a)|8.0 (cal/cm.sup.3).sup.0.5relational expression (1):
wherein SP(a) is the SP value of a structural unit derived from the monomer (a) constituting the polymer (A); and
SP(x) is the SP value of a structural unit derived from the monomer (x) different from the monomer (a) constituting the polymer (A).

The present invention provides an electrophotographic toner binder containing, as a main component, a polymer whose constituent monomer is a monomer having an ethylenically unsaturated bond, the electrophotographic toner binder being excellent in low-temperature fixability, hot-offset resistance, and storage stability. The present invention provides an electrophotographic toner binder containing a polymer (A) containing a monomer (a) and a monomer (x) different from the monomer (a) as essential constituent monomers, wherein the monomer (a) is a (meth)acrylate having a C18-C36 acyclic hydrocarbon group, the polymer (A) has an acid value of 40 or less, and the polymer (A) satisfies the following relational expression (1):

1.1 (cal/cm.sup.3).sup.0.5|SP(x)SP(a)|8.0 (cal/cm.sup.3).sup.0.5relational expression (1):

wherein SP(a) is the SP value of a structural unit derived from the monomer (a) constituting the polymer (A); and
SP(x) is the SP value of a structural unit derived from the monomer (x) different from the monomer (a) constituting the polymer (A).

The present invention provides a toner for development of electrostatic images including a polyester-based resin and a polypropylene-based wax, which is excellent in fusing properties on a polypropylene film. The present invention relates to [1] a resin binder composition for toners for development of electrostatic images which has an endothermic amount ratio H.sub.CW/W of not less than 0.10 and not more than 0.80, [2] a resin binder composition for toners for development of electrostatic images in which a volume-median particle size (D.sub.50) of a wax as a whole contained therein is not less than 1 m and not more than 50 m; a volume-median particle size (D.sub.50) of a small particle size component of the wax is not less than 20 nm and not more than 400 nm; and a content of the small particle size component in the wax is not less than 20% by mass and not more than 90% by mass, [3] a process for producing a resin binder composition for toners for development of electrostatic images in which a polypropylene-based wax is added to a reaction system prior to addition polymerization upon production of a composite resin as a resin binder; and [4] a toner for development of electrostatic images including the resin binder composition as described in the above [1] or [2].

Provided is an image forming method using an electrostatic image developing toner containing: toner mother particles including a binder resin; and an external additive, wherein the binder resin contains a vinyl resin in an amount of 40 mass % or more with respect to the total amount of the binder resin, the image forming method including a step of: forming an image so that an image surface resistance value at 70 C. by a temperature change method of the formed image is set to be 510.sup.13 or less.

Described herein is a method of providing an overcoated printed substrate. The method may comprise: providing a printed substrate comprising a primer layer disposed on a print substrate and a liquid electrostatically printed layer disposed on the primer layer; and applying a UV curable overcoat composition to the printed layer of the printed substrate, wherein the UV curable overcoat composition comprises a UV curable resin and inorganic nanoparticles dispersed therein.

A toner includes a toner particle containing a resin component containing an olefin copolymer, wherein the olefin copolymer includes a specific monomer unit Y1 and a specific monomer unit Y2, and the content of the olefin copolymer in the resin component is more than 50 mass % based on the total mass of the resin component, and the olefin copolymer has a melting point of 80 C. or more and 150 C. or less.

A method for producing a toner includes a step (1) of forming resin microparticles in an aqueous medium in the presence of a surfactant, a step (2) of aggregating the resin microparticles to form aggregated particles, and a step (3) of heating and the aggregated particles and allowing the aggregated particles to coalesce to form toner particles, in which a resin component in the resin microparticles contains an olefinic copolymer and resin A, the resin A has an acid value of 1 mgKOH/g or more and 50 mgKOH/g or less, the resin A has a SP value of 19.0 (J/cm.sup.3).sup.0.5 or more and 21.0 (J/cm.sup.3).sup.0.5 or less, and the resin component has an olefinic copolymer content of 50% by mass or more with respect to the total mass of the resin component.