A toner comprising a toner particle, wherein the toner particle includes a toner base particle containing a binder resin and includes a protruded portion on a surface of the toner base particle; the protruded portion comprises an organosilicon polymer and a polyhydric acid metal salt; and the polyhydric acid metal salt is present on a surface of the protruded portion.

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.

Provided is a two-component developer for developing an electrostatic latent image containing: toner particles having toner mother particles and an external additive on a surface of the toner mother particles; and carrier particles, wherein the external additive contains alumina particles; the alumina particles are subjected to a surface modification with a hydrophobilizing agent; among the hydrophobilizing agent existing on the surface of the alumina particles after the surface modification, a ratio of the hydrophobilizing agent in a state of being liberated from the surface is 20% or less when extraction treatment is performed under a predetermined condition; the alumina particles have a number average primary particle diameter in the range of 5 to 60 nm; and the carrier particles have a resin covering layer, and the resin covering layer is formed with an alicyclic (meth)acrylate monomer.

A toner includes toner particles each including a toner mother particle and an external additive adhering to a surface of the toner mother particle. The external additive includes silica particles. The silica particles each include a silica base, a first surface treatment layer covering the silica base, and a second surface treatment layer covering the first surface treatment layer. The first surface treatment layer contains a carboxy-modified silicone oil. The second surface treatment layer contains a specific copolymer including a first repeating unit represented by general formula (I) shown below and a second repeating unit represented by general formula (II) shown below.

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The silica particles have a non-ring-opened oxazoline group content of at least 1 mol/g and no greater than 500 mol/g as measured by gas chromatography-mass spectrometry.

There is provided a toner for developing electrostatic images, including an external additive and colored resin particles containing a binder resin, a colorant and softening agents. The colored resin particles contain a monoester compound A represented by formula (1) and a monoester compound B represented by formula (2) as softening agents. A content of the monoester compound A is in the range from 95 to 99% by mass, a content of the monoester compound B is in the range from 1 to 5% by mass, and a content of the softening agents is in the range from 10 to 30 parts by mass, with respect to 100 parts by mass of the binder resin. Formula (1) is R.sup.1COOR.sup.2. Formula (2) is R.sup.3COOR.sup.4.

Provided is a toner for developing electrostatic images that has an excellent balance between low-temperature fixability and heat-resistant shelf stability as well as good conveyance amount stability and printing durability, and causes less occurrence of fog in a high temperature and high humidity environment. The toner for developing electrostatic images of the present invention includes colored resin particles containing a binder resin and a colorant, and an external additive, wherein silica fine particles A having a sodium to silicon ratio of 0.1 to 1.8% by mass, are contained as the external additive.

A toner composition includes toner particles having a resin and a colorant, the composition further including an infrared luminescent taggant disposed on the surface of the toner particles. A method of making a toner composition includes toner particles having a resin and a colorant, the composition further including an infrared luminescent taggant disposed on the surface of the toner particles, the method includes blending toner particles with a surface additive package that includes the infrared luminescent taggant. An article includes a printed image disposed on the article, the printed image made with a toner composition including toner particles having a resin and a colorant, the composition further including an infrared luminescent taggant disposed on the surface of the toner particles, the printed image allowing authentication of the article by infrared detection of the infrared luminescent taggant.

A toner contains toner particles, titanate fine particles having a Group II element, and hydrotalcite compound fine particles as an external additive and satisfying 10Lt80 and 100LhWeight average particle diameter (D4) of toner particles0.50, when the number average particle diameter (D1) of primary particles of the titanate fine particles is defined as Lt (nm) and the number average particle diameter (D1) of primary particles of the hydrotalcite compound fine particles is defined as Lh (nm).

An electrostatic charge image developing toner includes a toner particle, a lubricant particle that is externally added to the toner particle, and a strontium titanate particle that is externally added to the toner particle, that has an average primary particle diameter of 10 nm or more and 100 nm or less, that has an average primary particle circularity of 0.82 or more and 0.94 or less, and that has a primary particle circularity that becomes 84% of accumulation of more than 0.92.

A toner package includes activated carbon and a toner composition. The toner composition includes toner particles and toner particle surface additives disposed on the toner particles. An amount of activated carbon present in the toner package is sufficient to reduce volatile organic compounds (VOCs).