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.

A toner comprising a toner particle, the toner particle comprising a binder resin, the binder resin comprises a crystalline resin A, the crystalline resin A comprises a monomer unit (a) having specific structure, when, in measurement of viscoelasticity of the toner, T1 ( C.) represents a temperature at which a storage elastic modulus G of the toner is 1.010.sup.7 Pa, tan (T1) represents a ratio (tan ) of a loss elastic modulus G of the toner to the storage elastic modulus G of the toner at the temperature T1 ( C.), and tan (T1-10) represents tan at a temperature T1-10 ( C.), the T1, the tan (T1), and the tan (T1-10) satisfy specific relationship, and the toner particle comprises a linear fatty acid metal salt having a valency of 2 or more.

A magnetic toner comprising a toner particle, the toner particle comprising a magnetic body, a crystalline resin A, and an amorphous resin B. The crystalline resin A has a monomer unit (a). The amorphous resin B has a monomer unit (b). A content of the crystalline resin A in the toner is 6.2 to 77.0 mass %. The sum of contents of the crystalline resin A and the amorphous resin B in the toner is 30.0 mass % or more. A content of the monomer unit (a) in the crystalline resin A is 50.0 to 100.0 mass %. Using SPA [(J/cm.sup.3).sup.0.5] for a SP value of the crystalline resin A and using SPB [(J/cm.sup.3).sup.0.5] for a SP value of the amorphous resin B, SPA and SPB satisfy 0.15SPBSPA2.00.

A toner comprising a toner particle, the toner particle comprising a binder resin, wherein T1, T2, T3, tan (T2), and tan (T210) satisfy expressions (1) to (4):

T3T110 (1)

50T270 (2)

0.30tan (T2)1.00 (3)

1.00tan (T2)/tan (T210)1.90 (4).

Where, in measurement of viscoelasticity of the toner, T1( C.) represents a temperature at which a storage elastic modulus G is 3.010.sup.7 Pa, T2( C.) represents a temperature at which the storage elastic modulus G is 1.010.sup.7 Pa, T3( C.) represents a temperature at which the storage elastic modulus G is 3.010.sup.6 Pa, tan (T2) represents a ratio (tan ) of a loss elastic modulus G to the storage elastic modulus G at the temperature T2( C.), and tan (T210) represents the ratio (tan ) at a temperature: T210( C.).

A toner, including a toner particle that contains a binder resin and a release agent, wherein the binder resin contains a polymer A, the polymer A including 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 selected from (meth)acrylic acid esters having a C.sub.18-36 alkyl group; the toner has a first monomer unit content and a second monomer unit content in the polymer A which are within specific ranges, and assuming that an SP value of the first monomer unit is taken as SP.sub.11 and an SP value of the second monomer unit is taken as SP.sub.21, the formula (1) below is satisfied, and the molecular weight of the release agent is at least 1,000.
3.00(SP.sub.21SP.sub.11)25.00(1)

A toner having an inorganic fine particle and a toner particle containing a binder resin, wherein the binder resin contains 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 that is different from the first polymerizable monomer, the first polymerizable monomer is selected from the (meth)acrylic acid esters each having a C.sub.18-36 alkyl group, the content of the first monomer unit in the polymer A is within a specific range, the SP value of the first monomer unit and the SP value of the second monomer unit are in a specific relationship to one another, the inorganic fine particle is surface treated with a compound having an alkyl group, and the volume resistivity of the inorganic fine particle is within a specific range.

Provided is a toner has a toner particle containing a binder resin and is characterized in that the binder resin contains a polymer A, which is a polymer of a composition containing a first polymerizable monomer, a second polymerizable monomer and a crosslinking agent, the first polymerizable monomer is at least one monomer selected from the group consisting of (meth)acrylic acid esters having an alkyl group with 18 to 36 carbon atoms, the crosslinking agent has two or more polymerizable double bonds, a content of the first polymerizable monomer in the composition is 5.0 to 60.0 mol %, a content of the second polymerizable monomer is 20.0 to 95.0 mol %, and when the SP values of the first polymerizable monomer, the second polymerizable monomer and the crosslinking agent are denoted by SP.sub.12, SP.sub.22 and SP.sub.C2, respectively, the formulae 0.60(SP.sub.22SP.sub.12)15.00 and SP.sub.12<SP.sub.C2<(SP.sub.22+3.00) are satisfied.

A toner that is suppressed from deteriorating owing to its long-term use and can maintain high transferability. The toner includes: a toner particle containing an amorphous polyester serving as a binder resin and a polymer A; and inorganic fine particles, wherein the polymer A includes a graft copolymer of a polyolefin and a vinyl-based polymer unit having a carboxylate anion group, and a metal ion having a valence of 2 or more.

Provided is a positive-charging toner having a toner particle that contains a binder resin, the binder resin contains 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, the first polymerizable monomer is at least one selected from the group consisting of (meth)acrylic acid esters having a C18 to C36 alkyl group, the content of the first monomer unit in the polymer A is 5.0 to 60.0 mol % and the content of the second monomer unit is 20.0 to 95.0 mol %, SP.sub.11 of the first monomer unit and SP.sub.21 of the second monomer unit satisfy 3.00(SP.sub.21SP.sub.11)25.00, and the work function of the toner is 5.0 to 5.4 V.

An image forming method includes: forming a toner image on a print medium by using a toner including toner particles having a binder resin which contains a condensate of straight-chain diol having 2 to 6 carbon atoms, an alkylene oxide adduct of bisphenol A and polyvalent carboxylic acid; and applying, to the toner image, a fixing solution containing an ester-based softening agent having a boiling point of not less than 180 C. so as to fix the toner image to the print medium.