Abstract: In the present invention, there is provide a toner for electrostatic image development comprising a resin, a coloring agent and a compound having at least one group represented by the formula:--O--A--CO-- ?I!wherein A represents a substituted or unsubstituted divalent hydrocarbon group.

Abstract: Disclosed is a method for producing a toner for developing electrostatic images, which comprises the steps of kneading a mixture of raw materials comprising at least a resin and a colorant, cooling the kneaded mixture, pulverizing the cooled mixture, classifying the pulverized mixture, and feeding a fine powder separated by the classification step to a melt of the mixture of raw materials in the middle of the kneading step. The toner has improved fixability, durability and storage stability, with which stable and high-quality images are obtained even by continuous copying operation.

Abstract: A toner for heat fixing comprising a styrene type resin and a colorant and satisfying the following formula:A.ltoreq.900 ppm and B.gtoreq.80%, orA.ltoreq.650 ppm and B.gtoreq.70%wherein A is a quantity of volatile components of the toner to be measured by a head space method, and B is a percentage of raw material monomers and solvents to be used in production of a binder resin in the quantity of the volatile components.

Abstract: A novel toner for developing electrostatic images is disclosed, which comprises at least a resin and a granulated carbon black having a grain hardness of 2 g or less as starting raw materials blended therein. In addition, a novel process for the production of the novel toner is described.

Abstract: Disclosed herein are an electrostatic image-developing toner comprising a binder resin, a quaternary ammonium salt and an acidic carbon black as colorant, and an electrostatic image developer containing the same.

Abstract: An electrostatic image-developing positively chargeable toner comprising at least toner particles containing a resin and a colorant, and conductive fine particles having their surface treated with a positively chargeable resin.

Abstract: Disclosed herein is an electrostatic image-developing toner comprising particles of a toner precursor particles composed of at least a resin and a colorant, and powder of a compound represented by the following formula (I):M.sup.1 y.sub.1.M.sup.2 y.sub.2.M.sup.3 x.(OH).sub.2.Ax/n.mH.sub.2 O(I)(wherein M.sup.1 is at least one of the divalent metals selected from the group consisting of Mg, Ca, Sr and Ba; M.sup.2 is at least one of the divalent metals selected from the group consisting of Zn, Cd, Pd and Sn; M.sup.3 is a trivalent metal; A is an anion of n valency; x, yl, yz and m are the positive numbers satisfying the relations of 0<x.ltoreq.0.5, y.sub.1 +y.sub.2 =1-x and 0.ltoreq.m<2).