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102 results about "Photographic developer" patented technology
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In the processing of photographic films, plates or papers, the photographic developer (or just developer) is one or more chemicals that convert the latent image to a visible image. Developing agents achieve this conversion by reducing the silver halides, which are pale-colored, into silver metal, which is black (when a fine particle). The conversion occurs within the gelatine matrix. The special feature of photography is that the developer acts more quickly on those particles of silver halides that have been exposed to light. Paper left in developer will eventually reduce all the silver halides and turn black. Generally, the longer a developer is allowed to work, the darker the image.
Electrophotographic developer and carrier therefor, core material particle for carrier for electrophotographic developer and production method thereof and image forming method
ActiveUS20070243482A1Minimize toner spentImprove image qualityElectrographic process apparatusDevelopersCost effectivenessEngineering
The present invention can provide small-diameter core material particles for electrophotographic carrier, the particles that can prevent occurrences of carrier adhesions and reduce toner spent, have excellent durability and cause little fluctuations in image density with a narrow particle diameter distribution, and an efficient, cost-effective production method thereof. That is, the core material particles for electrophotographic carrier are particles wherein the weight average particle diameter, Dw, is in the range of 22 μm to 32 μm, the ratio of Dw to the number average particle diameter, Dp, satisfies the condition, 1<Dw / Dp<1.20, the content of particles smaller than 20 μm in diameter is in the range of 0% by mass to 7% by mass and smaller than 36 μm is in the range of 90% by mass to 100% by mass, and the BET specific surface area is in the range of 300 cm2 / g to 900 cm2 / g.
Owner:RICOH KK
Electrophotographic toner and manufacturing method thereof, polyester resin for electrophotographic toner and manufacturing method thereof, electrophotographic developer and image forming method
ActiveUS20050255398A1Improve the fixing strengthImprove storabilityDevelopersElectrographic processes using charge patternRare-earth elementAlcohol
The present invention provides a binder resin that is used for an electrophotographic toner, an electrophotographic toner using the same, and a manufacturing method thereof, as well as an electrophotographic developer and an image forming method. The binder resin includes a rare earth element in a range of about 1 to 10000 ppm and is preferably made of a polyester resin. The polyester resin is preferably synthesized from from an acid unit having a dicarboxylic acid group and an alcohol unit having a diol group by use of a non-homogeneous catalyst in which a rare earth metal triflate or a rare earth metal triflylimide is carried on a carrier.
Owner:FUJIFILM BUSINESS INNOVATION CORP
Electrophotographic developing agent
InactiveUS20060063085A1Stable charge charge distributionPrevent foggingDevelopersPhotographic developerEngineering
An electrophotographic developing agent is provided. The electrophotographic developing agent includes toner particles and an external additive. The toner particles include a binder resin, a colorant, and a charge control agent. The external additives which are added to the toner particles include a large-diameter silica having a primary average particle size of about 20 to about 200 nm, a small-diameter silica having a primary average particle size of about 5 to about 20 nm, a hydrophobic titanium oxide, and a polymer bead. The electrophotographic developing agent can maintain a stable charge and charge distribution of the toner over a long period due to the addition of the external additives. The external additives prevent the fogging and the image contamination in a cycle of a charging roller.
Owner:SAMSUNG ELECTRONICS CO LTD
Electro-photographic developing agent
A non-magnetic one-constituent developing agent is an electro-photographic developing agent that provides high quality images without fogging, scattering of toners and ineffective development by maintaining stable charges and a uniform distribution of toners over an extended lifetime in a developing apparatus of an electro-photographic image processing device. In addition, the developing agent has deodorizing, anti-bacterial and sterilizing functions.
Owner:S PRINTING SOLUTION CO LTD
Leakage detecting agent for detecting leakage of weld joint in welding process and detection method
InactiveCN103558228AEasy to eraseSolve process problemsDetection of fluid at leakage pointOptically investigating flaws/contaminationTransformerFluorescence
The invention relates to a leakage detecting agent for detecting the leakage of a weld joint in the welding process and a detection method, and is suitable for leakage detection of the weld joint, with a sealing requirement, in a pipeline, a tank body and a transformer structural member. The technical scheme is as follows: the leakage detecting agent comprises a photographic developer and a penetrating agent, wherein the photographic developer refers to a turbid liquid prepared by stirring chalk powder and industrial alcohol; the penetrating agent comprises dimethylbenzene, butanol and red oil-soluble dye through mixing. The photographic developer is coated on one surface of the weld joint through welding, the penetrating agent is coated and brushed on an unwelded part of the back surface of the weld joint after being dried, and a red spot-shaped trace is observed from the surface of the photographic developer, namely, a leakage point exists in the position. According to the leakage detecting agent and the detection method, the problems of complicated operation process of postwelding pressure leakage testing, overlong fluorescent penetrating inspection leakage detection time and low efficiency are solved. The leakage detecting agent is applied to the practice, is convenient to configure, easy to operate and high in efficiency; the photographic developer is easily wiped, and the penetrating agent automatically volatilizes without residues, and thus no influences on subsequent welding, post-treatment operation and product quality are caused.
Owner:BAODING TIANWEI GRP CO LTD
Nonaqueous dispersion of resin particles
ActiveUS20130034809A1Improve heat stabilityUniform diameterInksPolyurea/polyurethane coatingsSolubilityOrganic solvent
Provided is a nonaqueous dispersion of resin particles, in which the resin particles have uniform particle diameters and shapes and which exhibits excellent fixing properties, particularly when used as a liquid electrophotographic developer. More specifically, provided is a nonaqueous dispersion (X) in which resin particles (C) are dispersed in a nonhydrophilic organic solvent (L) that exhibits a relative permittivity of 1 to 4 at 20° C., the resin particles (C) being core-shell type resin particles each of which comprise a resin particle (B) that contains a resin (b) and fine particles (A) that contain a resin (a) and that either adhere to the surface of the resin particle (B) or form a film on the surface of the resin particle (B), wherein the solubility of (a) in (L) at 25° C. is 10 wt % or less relative to the weight of (a).
Owner:SANYO CHEM IND LTD
Resin-coated ferrite carrier for electrophotographic developer, its production method, and electrophotographic developer using the resin-coated ferrite carrier
A resin-coated ferrite carrier having a uniform resin coating and emitting no offensive odors, etc., its production method, and an electrophotographic developer which comprises the resin-coated ferrite carrier, is excellent in the charge stability and image quality stability over a long period, causes less fogging of image or carrier adhesion, is favorable in the image density and environmental dependency, and can fully respond to high-speed and full-color imaging, are provided. The resin-coated ferrite carrier for the electrophotographic developer is characterized in that the surface of ferrite particles is coated with a mixed resin of a tetrafluoroethylene-hexafluoropropylene copolymer or a tetrafluoroethylene-perfluoroalkylvinyl ether copolymer and a polyamideimide resin, and that the mixed resin contains a silicon oxide.
Owner:POWDERTECH
Novel tumor VEGFR-3 molecular photographic developer and application thereof
ActiveCN105126128AReduce intakeGuaranteed successful preparationRadioactive preparation carriersLymphatic vesselNeogenesis
The invention relates to a novel tumor VEGFR-3 molecular photographic developer, which comprises polypeptide with a structural formula 68Ga-DOTA-GGG-Cyclic (CGLARGRGC), wherein DOTA is 1,4,7,10-tetraazacyclododecane-1,4,7,10-tetracarboxylic acid; the novel tumor VEGFR-3 molecular photographic developer is connected with the targeted VEGFR-3 molecular polypeptide under the chelation action of 1,4,7,10-tetraazacyclododecane-1,4,7,10-tetracarboxylic acid, and is labeled with a radionuclide tracer 68Ga. The novel molecular diagnostic agent 68Ga-DOTA-TMVP1 minute for PET inspection fills the blank of a neogenesis lymphatic polypeptide photographic developer for inspecting tumors by PET, so that great assistance in clinical VEGFR-3 molecular diagnosis in the future and instruction of the individuation of a tumor patient is realized.
Owner:武汉凯德维斯医学检验实验室有限公司
Electrophotographic toner and manufacturing method thereof, polyester resin for electrophotographic toner and manufacturing method thereof, electrophotographic developer and image forming method
The present invention provides a binder resin that is used for an electrophotographic toner, an electrophotographic toner using the same, and a manufacturing method thereof, as well as an electrophotographic developer and an image forming method. The binder resin includes a rare earth element in a range of about 1 to 10000 ppm and is preferably made of a polyester resin. The polyester resin is preferably synthesized from from an acid unit having a dicarboxylic acid group and an alcohol unit having a diol group by use of a non-homogeneous catalyst in which a rare earth metal triflate or a rare earth metal triflylimide is carried on a carrier.
Owner:FUJIFILM BUSINESS INNOVATION CORP
Electrophotographic developer carrier core material, manufacturing method therefor, electrophotographic developer carrier, and electrophotographic developer
ActiveCN102472989ANo reduction in transport volumePrevent image degradationDevelopersEngineeringElectrical and Electronics engineering
There is provided a carrier core material for electrophotographic developer containing a soft ferrite, expressed by (Mg X Mn 1-X )Fe 2 O 4 (wherein X is in a range of 0.1 X < 1.), wherein an analysis value of P on the surface of the carrier core material is 0.1 mass% or more, an analysis value of Mg is 2 mass% or more, a content of Mg in the carrier core material is 2 mass% or more by EDS, and when the content of Mg in the carrier core material is expressed by M1, and the analysis value of Mg on the surface of the carrier core material by EDS is expressed by M2, a value of M2 / M1 exceeds 1.0.
Owner:DOWA ELECTRONICS MATERIALS CO LTD +1
Sensible heat composition for positive thermosensitive CTP plate without preheating and plate-making method by using same
InactiveCN101738856AGood plate appearanceIncreased sensitivitySemiconductor/solid-state device manufacturingPhotosensitive material processingComputer to plateHeat sensitive
The invention relates to a sensible heat composition for a thermosensitive CTP (Computer to Plate) plate. The thermosensitive composition comprises a perether compound of one or more low molecular phenolic compounds as a dissolution inhibitor or a solutizer, and the molecular weight of the low molecular phenolic compound is 100-400. Furthermore, the invention also relates to a method for preparing the positive thermosensitive CTP plate without preheating. The method comprises the following steps of: (1) sequentially carrying out rough treatment, anodic oxidation treatment and sealing treatment on an aluminum plate base; (2) carrying out plate coating on the aluminum plate base through the sealing treatment by using the thermosensitive CTP (Computer to Plate) plate; (3) carrying out two-section drying on the coated aluminum plate base obtained in the step (2), wherein the first section is dried by using a far infrared ray to heat, while the second section is dried by using forced hot blast, thereby obtaining the positive thermosensitive CTP plate without preheating. The plate produced in the invention has favorable appearance, higher sensitivity, favorable development latitude and higher print run and can be used in cooperation with photographic developers universally utilized at home and abroad.
Owner:GUANGXI YULIN JINLONG PS PLATE PRINTING MATERIAL
Electrophotographic developing agent and electrophotographic imaging apparatus employing the same
An electrophotographic developing agent including toner particles containing a binder resin, a colorant, a charge control agent and a release agent, and an external additive to be added to the surface of the toner particles, wherein the charge control agent is a light metal complex compound, the release agent is a solid fatty acid ester based material, and the amount of the release agent is 1.5 to 4.0% by weight based on total weight of the toner particles. An electrophotographic image forming apparatus applying the electrophotographic developing agent is also provided. The developing agent can distribute stable charges over long term by using a light metal complex as a charge control agent and 1.5 to 4.0% by weight of a solid fatty acid ester-based material as a release agent in preparing a toner. Further, according to the developing agent, excellent toner fusing property and developing property can be maintained. Therefore, toner durability can be enhanced due to control of contamination and scattering, and enhancement of developing efficiency, and thus high quality of images can be obtained.
Owner:SAMSUNG ELECTRONICS CO LTD
Electrophotographic developing agent
InactiveUS20060110673A1Avoid problemsLength of timeElectrographic process apparatusDevelopersStrontium titanium oxideParticulates
Provided is an electrophotographic developing agent including: toner particles including a binder resin, a colorant, and a charge control agent; and an external additive added to the surface of the toner particles, wherein the external additive includes at least one inorganic particulate component and at least two types of strontium titanate particulate component having different mean primary particle diameters. Typically, the inorganic particulate component is not strontium titanate. Also, an electrophotographic image forming apparatus using the electrophotographic developing agent is provided. The strontium titanate particulate component having different mean primary particle diameters are used as an external additive to maintain uniform charging characteristics and to prevent fog in a non-image area, thereby obtaining good image quality. In addition, the external additives prevent deposition of the developing agent on a developing agent regulating blade due to stress when the developing agent is used for a long time.
Owner:HEWLETT PACKARD DEV CO LP
Electrophotographic developer and process for forming image
InactiveUS20020115009A1DevelopersElectrographic processes using charge patternImaging qualityVolume average
An electrophotographic developer is provided that attains improvement in reliability by improvement in cleaning property and reduction in wear of a photoreceptor in a well-balanced manner without impairing high transfer efficiency and high image quality of a spherical toner. The electrophotographic developer contains a toner and a carrier, the toner containing spherical colored particles having an average shape factor (ML2 / A) of about from 100 to 135 and irregular-shaped non-colored particles having a volume average particle diameter of about from 1 to 10 mum, a charge distribution of the developer having a peak value Q / Ma ascribable to the spherical colored particles and a peak value Q / Mb ascribable to the irregular-shaped non-colored particles, and the peak value Q / Ma and the peak value Q / Mb satisfying both the following formulae (1) and (2):<paragraph lvl="0"><in-line-formula>20 muC / g<=|Q / Ma|<=85 muC / g (1)< / in-line-formula><paragraph lvl="0"><in-line-formula>-0.7Q / Ma<=Q / Mb<=0.5Q / Ma (2)< / in-line-formula>
Owner:FUJIFILM BUSINESS INNOVATION CORP
Electrophotographic developer and process for forming image
InactiveUS6517985B2DevelopersElectrographic processes using charge patternImaging qualityImage formation
An electrophotographic developer is provided that attains improvement in reliability by improvement in cleaning property and reduction in wear of a photoreceptor in a well-balanced manner without impairing high transfer efficiency and high image quality of a spherical toner. The electrophotographic developer contains a toner and a carrier, the toner containing spherical colored particles having an average shape factor (ML2 / A) of about from 100 to 135 and irregular-shaped non-colored particles having a volume average particle diameter of about from 1 to 10 mum, a charge distribution of the developer having a peak value Q / Ma ascribable to the spherical colored particles and a peak value Q / Mb ascribable to the irregular-shaped non-colored particles, and the peak value Q / Ma and the peak value Q / Mb satisfying both the following formulae (1) and (2):
Owner:FUJIFILM BUSINESS INNOVATION CORP
Resin-coated carrier for electrophotographic developer and process for producing the same, and electrophotographic developer comprising the resin-coated carrier
An object of the present invention is to provide a resin-coated ferrite carrier comprising a carrier core material having a small particle size, a high sphericity and surface uniformity, and a low standard deviation, a process for producing the carrier, and an electrophotographic developer comprising the resin-coated ferrite carrier and having a high image quality and excellent durability. For achieving the above object, there is provided a resin-coated carrier for an electrophotographic developer characterized by comprising spherical ferrite particles having an average particle size of 20 to 50 μm, a surface uniformity of 90% or more, an average sphericity of 1 to 1.3 and a sphericity standard deviation of 0.15 or less, a process for producing the carrier, and an electrophotographic developer comprising the resin-coated carrier.
Owner:POWDERTECH
Method for detecting subsurface crack of casting blank
InactiveCN103604753AImprove detection accuracyAvoid affecting subsequent productionColor/spectral properties measurementsCrazingSuperficial mass
The invention discloses a method for detecting subsurface cracks of a casting blank. The method includes the steps of: polishing away surface scale on a part to be detected of a casting blank to form a detection surface and to ensure the smoothness of the surface to be detected, and cleaning the surface to be detected; spraying a penetrating agent on the surface to be detected, wherein if the casting blank has micro cracks or cracks, the penetrating agent penetrates into the depths of the micro cracks or cracks by using the capillarity principle; cleaning the penetrating agent on the surface to be detected, spraying a photographic developer on the surface of the surface to be detected, and expressing the penetrating agent in the micro crack or cracks on the photographic developer under the effect of the capillary principle; if the casting blank has micro cracks or cracks, expressing the stripes according to the size and length of the cracks on the surface to be detected, wherein if no stripes appear, then the casting blank has no cracks or cracks. The method provided by the invention can improve the detection accuracy on surface quality of the casting blank, and avoid the influences on the subsequent production due to undetected defects of microscopic subsurface micro cracks.
Owner:INNER MONGOLIA BAOTOU STEEL UNION
Electronic photographic developer and method for forming image
InactiveCN1359033AExcellent powder storage stabilityGood anti-agglomeration effectDevelopersNitrogenEngineering
An electrophotographic developer and a process for forming an image are provided in that the fixing can be conducted at a lower temperature than the conventional technique, and that are excellent in the powder storage stability, the anti-blocking property and the image storage stability after fixing without impairing the density, the coloring property and the transparency of the image after fixing, and further have appropriate electric charging property without any problem of fogging or cloud with excellent maintenance property of electric charge. The electrophotographic developer contains a toner for developing an electrostatic image containing a coloring agent and a binder resin containing, as a main component, a crystalline resin having a melting point of about from 60 to 120 DEG C., and a carrier having a resin film containing a nitrogen-containing resin on a surface thereof. The process for forming an image is carried out by using the electrophotographic developer.
Owner:FUJIFILM BUSINESS INNOVATION CORP
Device for transfer of flat display panel
ActiveCN1990363AShorten takt timeReduce manufacturing costsPhotomechanical apparatusSemiconductor/solid-state device manufacturingDisplay deviceEngineering
The invention relates to a transferring device of flat display with plaque for obtaining highest space utilance by smallest mounting space of developing device. The invention includes a chamber for providing plaque processing space; a photographic developer supply device, mounted in the chamber, for coating the photographic developer on the plaque inputting to the chamber; a supporting part mounted inside of the chamber with definite frame construction; a plurality of inclined transferring parts hinging with the supporting part with transferring roller rotating by the drive unit and for transferring plaque by the transferring roller; a guiding mechanism for guiding the supporting part to move; another drive unit for ascending and descending the supporting part; a inclined induction device for inducing a plurality of inclined transferring parts to incline definite angle by the hinging part as center.
Owner:WEIHAI DMS OPTICAL ELECTROMECHANICAL CO LTD +1
Oil charging device oil permeating point positioning detector and using method thereof
ActiveCN103364152APrecise positioningEasy to operateDetection of fluid at leakage pointSprayerSolvent
The invention discloses an oil charging device oil permeating point positioning detector and a using method thereof. The oil charging device oil permeating point positioning detector comprises an insulating rod body and an insulating box body arranged at the top end of the insulating rod body. An electric insulating brush head and a camera are connected to a side plate of the insulating box body, and a plurality of automatic sprayers are arranged inside the insulating box body. A motor is arranged inside the insulating rod body, and switch buttons with different gears are arranged at the lower end of the insulating rod body. The using method comprises the steps of preparing mist spray solvent, rinsing greasing, spraying penetrant, washing the penetrant, spraying white photographic developer, photographing and positioning oil permeating points. By means of the structure and the method, an electrically charged device does not need to be turned off, a user only needs to stand on the ground and turns on the switch buttons of the corresponding gears, then, cleaning agents are automatically sprayed, the electric insulating brush head cleans and scrubs, the penetrant and the white photographic developer are automatically sprayed and photographing is carried out on the oil permeating positions, an operator observes blackened and darkened points of the white photographic developer from a video or an image, and the points are the oil permeating points. Operation is easy and convenient, and the oil permeating points are positioned accurately.
Owner:STATE GRID CORP OF CHINA +3
Replenishing toner used from electrophotographic developer
InactiveUS20120207489A1Reduce dustEvenly distributedElectrographic process apparatusLatent imageEngineering
Two-component developer in an electrophotographic (EP) printer is replenished. Image data are received and a corresponding latent image is produced. Toner is supplied to the latent image by bringing developer containing toner particles and carrier particles into proximity with the latent image on the photoreceptor using a toning member, so that toner particles are removed from the developer to produce depleted developer. The depleted developer is transported to a return channel, along which it is moved at a channel speed. A processor automatically estimates, as a replenishment amount of toner to be added to the return channel, the amount of toner supplied to the latent image in a diagonal swath on the photoreceptor defined by the process surface speed and the channel speed using the received image data. The replenishment amount of toner is added to the depleted developer in the return channel to replenish the developer.
Owner:EASTMAN KODAK CO
Pyridazinone compound containing polyethyleneglycol (PEG) modified benzyl triazolyl and preparation method and application thereof
InactiveCN102898421AWide variety of sourcesEasy to getOrganic chemistryRadioactive preparation carriersBiological propertyChemical compound
The invention provides a pyridazinone compound containing polyethyleneglycol (PEG) modified benzyl triazolyl. According to the pyridazinone compound, a molecular formula is Fmppn, and a structure is shown as a formula (1), wherein n is an integral number of 1 to 8; and F is 19F or 18F. The pyridazinone compound has the characteristics of simplicity in preparation, low using cost, high radiochemical yield and radiochemical purity, high stability and biological properties, high target-to-nontarget ratio, high myocardial intake value and the like, and is used as a novel fluorine-18 marked myocardial perfusion photographic developer to be applied to the technical fields of radiopharmaceutical chemistry and clinical nuclear medicine.
Owner:张现忠 +2
Evans blue complex as well as preparation method and application thereof
The invention provides an Evans blue complex which is of formula (I) as shown in the specification. The Evans blue complex structurally comprises two serum albumin combined groups and one macrocyclicpolyamine chelated group NOTA. The invention further provides a marking complex prepared from the Evans blue complex after radionuclide marking. The marked complex provided by the invention is simpleto mark and biological property; biological test results show that the complex has a property of distinguishing sentinel nodes from secondary lymphatic glands. The invention further relates to a preparation method and application of the complex in preparing organ and tissue photographic developers of human beings or animals.
Owner:SHANGHAI THERANOSTICS BIOTECH CO LTD
Electrophotographic developer carrier and electrophotographic developer using the same carrier
Owner:POWDERTECH
Photosensitive member cartridge, developer cartridge and process cartridge having handle interlocking elements
Owner:BROTHER KOGYO KK
Iminodiacetic-acid-containing 99mTc-marked RGD polypeptide tumor diagnosis drug and preparation method thereof
ActiveCN106474495AEasy to makeLow priceRadioactive preparation carriersFunctional connectivityAlpha-v beta-3
The invention provides a 99mTc complex taking iminodiacetic acid as a difunctional chelating agent. Structure of the complex is shown as a formula (1). The complex has the advantages of simplicity in preparation, low cost, high marking rate, radiochemical purity, target to non-target ratio and tumor uptake value, long residence time and low liver-kidney background. The complex can serve as a novel photographic developer marked by technetium-99m and used for positive tumor diagnosis of intergrin alpha v beta 3 receptor to be applied in the technical field of radioactive medicinal chemistry and clinical nuclear medicine.
Owner:FUWAI HOSPITAL CHINESE ACAD OF MEDICAL SCI & PEKING UNION MEDICAL COLLEGE
Positron nuclide labeled selenocysteine compound and application thereof
The invention relates to a Se-substituted positron nuclide labeled L-selenocysteine compound. The general structure formula of the Se-substituted positron nuclide labeled L-selenocysteine compound is shown in the specification, wherein R* represents for -11CH3, -CH218F, -CH2CH218F, -CH2CH2CH218F. Positron nuclide (11C or 18F) is labeled in the position of -Se in L-selenocysteine so as to form a novel Se-substituted positron nuclide labeled L-selenocysteine compound. A preparation method of the labeled selenocysteine compound is simple and capable of easily achieving automatic synthesis. The labeled selenocysteine compound is highly absorbed in the tumor tissue. The invention also relates to application of the selenocysteine compound in preparation of a positron emission tomography (PET) photographic developer; the selenocysteine compound can be used for identifying and diagnosing tumor, monitoring the curative effect of the anti-tumor treatment, diagnosing cardiovascular and cerebrovascular diseases and monitoring curative effect of treatment of the cardiovascular and cerebrovascular diseases.
Owner:广州市原子高科同位素医药有限公司
Method of manufacturing bus electrode of plasma display board
InactiveCN1599001AFulfil requirementsSimple processing methodCold cathode manufactureEtchingUltraviolet lights
The production method of the Plasma Display Panel junction electrode is the production method of the alternating and direct current Plasma Display Panel accordant junction electrode during producing the alternating and direct current Plasma Display Panel. Its production method includes the following steps: a. spread the sensitization glue on the transparent conductive film covered on the surface of the basal lamina; b. exposure: spread the masking board with line drawing on the surface of the sensitization glue and irradiate the masking board and sensitization glue with ultraviolet light; c. developing: spray the processed basal lamina with the photographic developer and get rid of the petrified sensitization glue; d. etching: spray the developed basal lamina with etching solution; e. plating: plate the junction electrode on both sides of the transparent current-carrying electrode; f. stripping of photoresist: put the plated things into the stripping of photoresist solution, marinate it for several minutes, get rid of the petrified sensitization glue on the surface of the transparent current-carrying electrode and finish preparing the junction electrode.
Owner:SOUTHEAST UNIV
Magnetic carrier for electrophotographic developer and process for producing the same, and two-component system developer
The present invention relates to a magnetic carrier for an electrophotographic developer comprising spherical composite core particles comprising at least ferromagnetic iron oxide fine particles and a cured phenol resin, and having an average particle diameter of 20 to 60 μm, the magnetic carrier for an electrophotographic developer satisfying the formula (1): σ1−σ0=−2 to 0 wherein σ0 represents a saturation magnetization (Am2 / kg) of the carrier particles having a particle diameter in the vicinity of the average particle diameter of the magnetic carrier for an electrophotographic developer; and σ1 represents a saturation magnetization (Am2 / kg) of the carrier particles having a particle diameter of less than 20 μm, and a two-component system developer using the magnetic carrier. The two-component system developer of the present invention includes a magnetic carrier used for an electrophotographic developer which can exhibit a good durability, is free from occurrence of carrier adhesion, and can maintain a high quality of images produced for a long period of time, and comprises the magnetic carrier for an electrophotographic developer and a toner.
Owner:TODA IND
Electrophotographic developing agent
InactiveUS20070134578A1Improve acid resistanceGood alkali resistancePigmenting treatmentDevelopersHeat resistanceCharge control
An electrophotographic developing agent including an untreated toner including a binding resin, a black colorant, and a charge controlling agent, and an external additive added to a surface of the untreated toner, wherein the black colorant includes a titanium oxide. Accordingly, the electrophotographic developing agent has good mixing properties, dispersion properties, and heat resistance while maintaining proper image concentration. Also, the electrophotographic developing agent can be employed in an electrophotographic image forming apparatus.
Owner:SAMSUNG ELECTRONICS CO LTD
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