Abstract: A method of preparing an electrophotographic toner is discloser, comprising subjecting polyester resin particles and colored microparticles to coagulation and fusion in an aqueos medium to form toner particles, wherein the colored microparticles comprise a colorant and a crosslinked polyester resing or a nitrogen-containing polycondensate resing.

Abstract: An electrophotographic toner comprising a resin and a colorant, wherein: (i) a toner particle comprises a domain in the toner particle, the domain comprising a polar wax having a first polar group and a non-polar wax; and (ii) the resin contains a second polar group.

Abstract: An electrophotographic toner comprising a resin, a colorant and a release agent which comprises a first wax and a second wax, wherein: (i) the first wax exhibits: an endothermic peak appearing in the range 75-100° C., a peak width at half height of the endothermic peak of 10-40° C., an exothermic peak appearing in the range 70-100° C. and a peak width at half height of the exothermic peak of 10-40° C., in a DSC measurement; (ii) the second wax exhibits: an endothermic peak appearing in the range 60-90° C., a peak width at half height of the endothermic peak of 5° C. or less, an exothermic peak appearing in the range 55-80° C. and a peak width at half height of the exothermic peak of 5° C. or less, in the DSC measurement; (iii) a weight ratio of the first wax to the second wax is between 9:1 and 2:8; and (iv) the resin contains a polar group.

Abstract: In order to provide a reproducible information holding medium which is capable of being easily removed in a state that a printing label layer does not remain on a substrate, a reproducing method thereof and a reproducing apparatus, a card 10A is constituted so that an adhesive label 16 to be a signature section is laminated onto a substrate 12 as an IC card. A water growth layer 14 is provided between the adhesive label 16 and the substrate 12. The water growth layer 14 is fixed onto the substrate 12 by an intermediate adhesive layer 19. Water is supplied to the adhesive label 16 so that the water growth layer 14 swells and the adhesion of the adhesive label 16 is weakened. The adhesive label 16 can be peeled easily. A new adhesive label is laminated to the water growth layer from which the adhesive label 16 is peeled, so that the card 10A is reproduced.

Abstract: In the present invention, a pigment is irradiated with a microwave so as to improve a surface thereof. Further, letting A be an area of a portion having hydrophilic groups on a surface of the pigment and B be an area of the other portion thereon, which are respectively found by measuring infrared spectrometers of the pigment, a ratio (A/B) is not less than 4. Water base ink according to the present invention is obtained by dispersing such a pigment in an aqueous medium.

Abstract: A liquid composition according to the present invention includes an organic solvent having a vapor pressure of 30 to 60 mmHg at 20° C. and water, wherein a weight ratio of the organic solvent and the water is between 95:5 to 45:55. The invention further provides an ink set which comprises the liquid composition and an ink, and an image forming method which employ the liquid composition and the ink.

Abstract: In a direct-injection gasoline engine which is so constituted as to execute a twice-injection mode for injecting the fuel in the intake stroke and in the compression stroke, respectively, at the time of change-over between the stratified mode and the homogeneous mode, the fuel injection amount is set to be constant in either the intake stroke or the compression stroke in the twice-injection mode, and an amount obtained by subtracting the above constant amount from the required injection amount is injected in the other stroke. Setting the fuel amount to be constant at one injection timing makes it easy to comply with the operation for controlling the fuel injection in the twice-injection mode.

Abstract: A fuel injection control system for a cylinder direct injection spark-ignition internal combustion engine judges a homogeneous charge combustion condition which requires homogeneous charge combustion and a stratified charge combustion condition which requires stratified charge combustion, in accordance with an engine operating condition. Fuel is supplied on an intake stroke so as to form a rich equivalent ratio in the homogeneous charge combustion, and fuel is supplied on a compression stroke so as to form a lean equivalent ratio in the stratified charge combustion, with the rich equivalent ratio being richer in fuel than the lean equivalent ratio. The system then gradually changes over an equivalent ratio within a range between the rich and lean equivalent ratios when engine operation is changed over between the homogeneous charge combustion condition and the stratified charge combustion condition.

Abstract: The present invention relates to an ink for ink-jetting containing at least a coloring material, water soluble organic solvent and water, comprising:0.01-5.0% by weight of alkylene oxide adduct of acetylene glycol, represented by the formula (A): ##STR1## (in which R.sub.1 -R.sub.4, are respectively an lower alkyl group; l is an integer of 2 or 3; and m and n are respectively an integer of 1 or more);6.0-14.0% by weight of a compound selected from the group consisting of a polyalcohol having three hydroxy groups, alkylene glycols represented by the formula (B):HO(C.sub.x H.sub.2x O).sub.y H (B)(in which x and y is respectively an integer, provided that x is 2 or more and x and y have a relation of 2.ltoreq.X.times.y.ltoreq.6), and a mixture thereof;4.0-10.0% by weight of a lower alkyl ether of alkylene glycol represented by the formula (C):HO(C.sub.p H.sub.2p O).sub.q R (C)(in which R is a lower alkyl group, p and q is respectively an integer, provided that p is 2 or more and p and q have a relation of 2.

Abstract: The present invention aims at preventing such a situation that anyone of the divided injection amounts becomes less than a minimum compensation amount for a fuel injection valve, in case of conducting a two-step injection (weakly stratified combustion) in which a part of fuel is injected during intake stroke and the remaining fuel is injected during compression stroke. To this end, at the time of instructing to conduct the two-step injection, a whole injection amount TI is divided into: an injection amount TIH for homogeneous combustion to be injected during intake stroke, and an injection amount TIS for stratified combustion to be injected during compression stroke, based on a division ratio corresponding to a target air-fuel ratio. Further, each of the injection amounts TIH and TIS after division is compared with a minimum compensation amount MIN for the fuel injection valve.

Abstract: In the control method and apparatus of a direct injection gasoline engine, as for the uniform charge combustion mode performing only the intake stroke injection and the stratified charge combustion mode performing only the compression stroke injection, the injection timing is determined by referring to the injection timing map set for each mode. On the other hand, in the double injection mode performing the intake stroke injection and the compression stroke injection, the injection timing map for the intake stroke injection and the injection timing map for the compression stroke injection are both equipped, and the injection timing in the intake stroke injection is determined by the fuel quantity being injected by the intake stroke, and the injection timing in the compression stroke injection is determined by the fuel quantity being injected by the compression stroke.

Abstract: The present invention relates to an ink for ink-jet recording containing carbon black particles having a specific surface active hydrogen content, water, and polyethyleneimine or alkylene oxide adduct of acetylene glycol.

Abstract: An aqueous recording solution for ink jet according to the present invention contains at least a water-soluble dye, a water-soluble fungusproofing agent and water, and a liquid extracted from at least one type of malvaceae, orchidaceae and aloe is used as the water-soluble fungusproofing agent.

Abstract: The present invention relates to an ink for ink-jetting, comprising: a coloring material, alkylene oxide adduct of acetylene glycol, water, and polyethyleneimine, alkali metal ethylenediaminetetraacetate or a mixture of NaOH with at least one compound selected from the group consisting of NaHCO.sub.3 and Na.sub.2 B.sub.4 O.sub.7.

Abstract: This invention relates to the ink for ink-jetting using water-soluble reactive dye represented by general formula (A): ##STR1## wherein R.sub.1, R.sub.2 and R.sub.3 are hydrogen atom or alkyl group, X represents substituted or unsubstituted phenylene group, substituted or unsubstituted diphenylene group, substituted or unsubstituted naphthylene group or --NR.sub.3 --X--R.sub.3 N-- represents 1,4-pyperazinylene group, M is alkaline metal, quaternary ammonium or hydrogen atom, n is an integer of 1 to 5, m is an integer of 1 to 5 and "l" is 5-m,and by using those dyes as magenta dye excellent light resistance and water resistance are given to the ink.

Abstract: The present invention discloses an ink-jet type recorder comprising reserving means for withholding a recording liquid consisting of a mixture of electroviscous liquids (EVL) and coloring materials, the reserving means including a plurality of nozzles from which a jet of the recording liquid spouts out, and a plurality of pairs of electrodes for impressing a voltage to the recording liquid withheld in the reserving means, wherein the impressed voltage to the plurality of pairs of electrodes is controlled in order to change the viscosity of EVL so that a jet of the recording liquid spouts out from the plurality of nozzles onto recording media.

Abstract: The present invention relates to a photosensitive member with a photosensitive layer on or over an electrically conductive substrate, in which the photosensitive layer comprises at least one of azo pigments selected from the group consisting of azo pigments represented by the following general formulas [I], [II] and [III]. ##STR1## in which Z.sub.1 is a residual group of a condensed ring excluding the benzene ring and the carbonyl group in the formula [I]; Z.sub.2 is a residual group of a condensed ring excluding the naphthalene ring and the carbonyl group in the formula [II]; Z.sub.1 and Z.sub.2 may have a substituent respectively; R.sub.1, R.sub.2, R.sub.3 and R.sub.4 represent independently a hydrogen atom, an alkyl group, an alkoxy group, a halogen atom, a hydroxy group or a nitro group; Ar.sub.1, Ar.sub.2, Ar.sub.3, Ar.sub.4 and Ar.sub.5 represent independently an arylene group which may have a substituent; Ar.sub.

Abstract: The present invention relates to a photosensitive member containing a specific bisazo compound described by general structural formula[I] and formed on an electrically conductive substrate; ##STR1## Wherein X is a hydrogen atom, halogen atom, alkyl radical, alkoxi radical, nitro radical or cyano radical; A is a diatomic radical selected from among the following: ##STR2## B is a coupler described by formulae [II] through [VI]; ##STR3## R is a hydrogen atom, halogen atom, alkyl radical, alkoxi radical, nitro radical or cyano radical; and Y is an aromatic carbocyclic residue or aromatic heterocyclic residue, each of which may have a substituent; G is a carbamoyl radical or sulfamoyl radical and may have a substituent; R.sub.1 is a hydrogen atom, alkyl radical, amino radical or carbamoyl radical, each of which may have a substituent, a carboxyl radical or cyano radical; M is an aryl group which may have a substituent, which is improved in photosensitivity and dispersibility.

Abstract: The present invention uses an azo pigment having in the center of an N-oxide heterocyclic structure as a photoelectrical charge-generating material. The pigments are excellent in dispersion stability in a dispersed solution, and enable the provision of a photosensitive member excellent in sensitivity properties.