A toner comprising a toner particle including a binder resin, wherein the toner is such that (1) when a powder dynamic viscoelasticity measurement method is used, a measurement start temperature is set to 25 C., and a ramp rate is set to 20 C./min, on a curve of a storage elastic modulus E (Pa) where a temperature ( C.) is plotted against an abscissa and the storage elastic modulus E is plotted against an ordinate, a temperature at a time when the E at a start of a measurement has decreased by 50% is from 60 C. to 90 C., and (2) a load at a yield point of a displacement-load curve which is determined by a nanoindentation method and where a load (mN) is plotted against an ordinate and a displacement amount (m) is plotted against an abscissa, is 0.80 mN or more; and a method for producing thereof.

A method for producing an article having a novel metal gloss which does not use a solvent when forming an article having metallic luster, and a toner for metallic luster color and a printing method using the same.

Described herein is a method for manufacturing a low gloss toner. The method includes mixing a resin, a colorant and an optional wax in water to form an emulsion. The emulsion is heated in the presence of a polyion coagulant to form a plurality of aggregated particles, wherein the heating is to a temperature of below the glass transition temperature of the resin. Trisodium citrate dihydrate is added to the heated emulsion in amount of from 0.4 weight percent to about 1.0 percent by weight based on of a total weight of reagents while stirring, wherein the trisodium citrate dihydrate. The aggregated particles are heated to a temperature above the glass transition temperature of the resin to form toner particles have a volume average particle diameter of from 4.3 microns to 4.9 microns.

An electrostatic charge image developer contains a carrier including a core and, on the core, a silicone resin-containing layer serving as a lower layer, and an acrylic resin-containing layer serving as an upper layer, or a carrier including a silicone resin-containing core and an acrylic resin-containing layer on the silicone resin-containing core; strontium titanate particles having an average primary particle size of 20 nm or more and 100 nm or less; and a toner. The percentage of a silicone resin exposed on a surface of the carrier is 0.5 area % or more and 20 area % or less.

The present invention relates to a carrier core material for electrophotographic developer, having a ferrite composition and having a supernatant transmittance of 85.0% or more, a method for producing the carrier core material, a carrier for electrophotographic developer, containing the carrier core material, and a developer containing the carrier.

An electrostatic charge image developer contains a carrier including a core and, on the core, a silicone resin-containing layer serving as a lower layer, and an acrylic resin-containing layer serving as an upper layer, or a carrier including a silicone resin-containing core and an acrylic resin-containing layer on the silicone resin-containing core; strontium titanate particles having an average primary particle size of 20 nm or more and 100 nm or less; and a toner. The percentage of a silicone resin exposed on a surface of the carrier is 0.5 area % or more and 20 area % or less.

An electrostatic charge image development toner satisfies the following: (ln (T1)ln (T2))/(T1T2) is 0.14 or less, (ln (T2)ln (T3))/(T2T3) is 0.15 or more, and (ln (T2)ln (T3))/(T2T3) is more than (ln (T1)ln (T2))/(T1T2), where (T1) represents a viscosity of the toner at T1=60 C., (T2) represents a viscosity of the toner at T2=90 C., and (T3) represents a viscosity of the toner at T3=130 C.

A toner according to an embodiment includes a colorant, a binder resin, and an ester wax. The colorant, the binder resin and the ester wax form a toner particle. The ester wax contains two or more ester compounds represented by the general formula R.sup.1COOR.sup.2, where R.sup.1 and R.sup.2 each independently is an alkyl group. The total number of carbon atoms of R.sup.1 and R.sup.2 is in a range from 31 to 53. The two or more ester compounds have different number of carbon atoms from each other.

The magenta toner for developing electrostatic images includes colored resin particles containing a binder resin and a magenta colorant, and an external additive. A volume average particle diameter of the colored resin particles is from 5.5 m to 7.0 m. The external additive contains silica particles. The silica particles contain at least silica particles A having a number average particle diameter of from 5 nm to 30 nm and silica particles B having a number average particle diameter of from 31 nm to 100 nm; wherein a total content of the silica particles is from 0.5 part by mass to 4.5 parts by mass, with respect to 100 parts by mass of the colored resin particles. A liberation rate of the silica particles calculated by a specific liberation rate measuring method is in a range of from 2.2% to 9.5%.

Provided is a toner having low-temperature fixability and excellent heat-resistant storage stability, controlling charge reduction of a developer due to development stress, and being able to maintain high image quality throughout the product life (life), and the method for producing the toner, and the developer containing the toner and the image forming device using the developer. The toner includes: toner core particles containing at least a binder resin and a release agent; and external additives externally added to surfaces of the toner core particles. The binder resin contains a crystalline polyester-based resin, the toner core particles have a viscosity at 90? C. of 100000 to 250000 Pa.Math.s, the external additives are small size silica particles hydrophobized and barium titanate particles hydrophobized, and the barium titanate particles have an average primary particle size of 20 to 40 nm and a coverage of 2 to 7% for the toner core particles.