30results about How to "Less fog" patented technology

Thermographic or photothermographic image recording elements comprising (a) a reducible silver salt, (b) a reducing agent, (c) a binder, (d) a specific phthalazine derivative and (e) an organic acid compound experience a minimized drop of image density when stored under warm humid conditions.

A toner which has i) toner base particles containing at least a binder resin and a colorant and ii) a fatty acid metal salt composition as an external additive. The fatty acid metal salt composition contains a nonionic surface-active agent and a fatty acid metal salt. This toner and an image forming process making use of the toner can keep the toner from adhering to a toner carrying member throughout running, promise a stable chargeability of the toner and can keep any deterioration of halftone image quality from being caused by excess charging of the toner and any image fog from being caused by insufficient charging of the toner.

The invention relates to a printing ink composition, containing at least one binder, a formaldehyde-free carbonyl-hydrated ketone aldehyde resin, a coloring agent, and further containing an optionally auxiliary agent and additive when it is necessary; the carbonyl-hydrated ketone aldehyde resin is made by using the formaldehyde as the base, having low viscosity, a very low color number, and very high heat and light resistance. This invention further relates to a method for the production and the use thereof.

The toner of the present invention, comprising a colored resin particle and an external additive, wherein said external additive contains a silica fine particle (A) having a Dv50 / Dv10 of 1.8 or more, in which Dv10 represents a particle diameter at which a volume cumulative total from small particle diameter side is 10% and Dv50 represents a particle diameter at which the mentioned volume cumulative total is 50%, a volume average particle diameter in the range from 0.1 to 1.0μ, and a sphericity in the range from 1 to 1.3. The toner of the present invention cause less fog, and excellent resolution on the printed image, excellent in cleaning property, and cause less filming.

A process for producing a polymerized toner, which comprises steps of forming an aqueous dispersion comprising the colored polymer particles, subjecting the aqueous dispersion comprising the colored polymer particles to stripping treatment in the presence of a nonionic surfactant, dehydrating and washing the aqueous dispersion, wherein washing is carried out by using a washing water a temperature of which is controlled to lower than the cloud point of the nonionic surfactant, drying the wet colored polymer particles, and then getting the colored polymer particles.

A process for producing a toner by subjecting a polymer and a resin component containing a cross-linkable polymer capable of cross-linkingly reacting with the polymer, to cross-linking reaction in the presence of a first wax to form a wax-containing cross-linked polymer composition; mixing the wax-containing cross-linked polymer composition with at least a colorant and a second wax, followed by melt-kneading to form a toner composition; and pulverizing the toner composition to produce toner particles. Also disclosed is a toner produced by this process. The toner thus obtained is a toner whose fixing performance and anti-offset properties are well balanced and also which makes it possible to afford images having less fog and high quality, over a long period of time in environments of from low temperature and low humidity to high temperature and high humidity, and is highly durable without causing any contamination of members with which the toner comes into contact.

A photothermographic material exhibiting satisfactory photographic properties can be prepared using an aqueous dispersion of components. A photosensitive layer is formed by dispersing a binder and silver halide in an aqueous solvent containing at least 30 wt % of water to form an aqueous dispersion, coating the aqueous dispersion onto a support, and drying the coating. The binder is a polymer having an equilibrium moisture content of 0.1-2 wt % at 25 DEG C. and RH 60% or a thermoplastic resin. The binder is preferably based on a styrene-butadiene copolymer. Fog is suppressed even when the material is stored in a humid atmosphere.

The present invention provides an alkali-developable photo curable and heat curable one-liquid solder mask composition and the printed circuit board using the composition, and the composition has the advantages of excellent coating film characters such as heat resisting property, closing property, non-electrolysis gold plating resisting property and the electrical characteristic, etc., and little fog. The invention provides a photo curable and heat curable one-liquid solder mask composition and the printed circuit board using the composition, and the composition includes the following components: (A) a carboxylated photo sensitive resin which is provided with more than two ethylenically unsaturated groups in one molecule and more than one carboxyl, and the acid strength pKa of the carboxyl is below 5.0; (B) a diluent; (C) a a photopolymerization evocating agent; (D) a cyanuramide or the organic acid salt; and (E) an inorganic filler.

A photothermographic material exhibiting satisfactory photographic properties can be prepared using an aqueous dispersion of components. A photosensitive layer is formed by dispersing a binder and silver halide in an aqueous solvent containing at least 30 wt % of water to form an aqueous dispersion, coating the aqueous dispersion onto a support, and drying the coating. The binder is a polymer having an equilibrium moisture content of 0.1-2 wt % at 25° C. and RH 60% or a thermoplastic resin. The binder is preferably based on a styrene-butadiene copolymer. Fog is suppressed even when the material is stored in a humid atmosphere.

A magnetic one-component toner of the invention contains at least a binding resin and a magnetic powder, and has a volume average particle size of 6.0 to 9.0 μm, a compressibility of 15 to 50%, and a mean roundness of 0.950 to 0.960. The magnetic powder has at its surface a phosphorus element of 0.10 to 050% by weight. This toner is suitable for use in an image forming apparatus provided with a developer carrier made of stainless steel, or an image forming apparatus provided with an amorphous silicon photosensitive material. This toner has high transfer efficiency and less fog, thereby enabling to maintain image density for a long period of time, and form high image-quality image.

A method of forming an image includes the steps of providing a development bias having a DC component and an AC component superposed on one another and applying the development bias to a developer carrying member. The AC component is provided by superposing a waveform at a second frequency on a waveform at a first frequency in synchronism with each other. The second frequency is an odd multiple of the first frequency.

An object of the present invention is to provide a developing apparatus which can provide images having superior image density and less fogging.The present invention relates to a developing apparatus wherein a magnetic toner-carrying member has a work function value at the surface within a specific range, a toner regulating member which regulates toner carried on the magnetic toner-carrying member is formed by a specific material at a portion contacting the magnetic toner, and has a ratio [W / B] of the amount W of silica fine powder to the theoretical specific surface area B of the magnetic toner satisfying a specific relation.

A magnetic toner contains, as a magnetic powder, magnetic iron oxide having an octahedral particle shape and an average particle diameter of 0.21 μm or larger and containing 18% or more by weight of FeO. The magnetic toner is so prepared as to have a bulk density A (g / cm3) and a magnetic powder content B (% by weight) that fulfill the formulae 0.8≦A / B×100≦1.6 and 35≦B≦50. This alleviates the reddishness of images produced with the magnetic toner, and alleviates the disturbance of a thin toner layer on a developing sleeve and thus the fogging resulting therefrom.

The invention relates to assemblies in a printing unit of a rotary press, each assembly comprising at least one plate cylinder (02), three ink form rollers (03,04, 06), two vibrator rollers (12,13) and an ink separator roller (11). Both vibrator rollers (12,13) are applied directly to the ink separator roller (11) and one of the ink form rollers is applied to both one of the vibrator rollers and the plate cylinder, the remaining two ink form rollers being applied both to the other vibrator roller and the plate cylinder. The plate cylinder (02) is covered with several forms and / or the upper ink form roller (06) is located in such a way that a horizontal tangent (T06) to the circumference of said ink form roller lies at a vertical distance (a06) of at least 50mm from a horizontal tangent (T06) to the circumference of the plate cylinder.

A thumb buckle 33 of an automatic unlocking type garden water gun is in a frame shape so that the thumb buckle 33 can be conveniently poked by the thumb of each of the left hand and the right hand, and a rotating valve element 34 is provided with a rotating valve protrusion so that the rotating valve element 34 can be closed, and the rotating valve element 34 is provided with double through holes so that the rotating valve element 34 can be opened. A switching water type device of a water outlet device is provided with multiple air injection type bubbler air inlet inner cavities different in height so that water nozzle rotation winding preventing can be better facilitated, and water spray can be better sprayed out to softly float and diffuse, and the multiple air injection type bubbler air inlet inner cavities can be conveniently used for surface spraying coating of fragile and tender flowers and artware. Inner air injection openings containing equiangular logarithmic spirals are formed in the side face circumferences of multiple bubbler air injection type water-gas mixing ring-shaped inner cavities 30. A water nozzle 360-degree rotation winding preventing shell 31 and a water nozzle 360-degree rotation winding preventing inner core 32 are rotationally arranged under a water gun body. The water nozzle 360-degree rotation winding preventing shell 31 is provided with multiple grooves, and the water nozzle 360-degree rotation winding preventing inner core 32 is provided with multiple protruding ribs. Elastic material sealing rings are arranged between the multiple grooves and the multiple protruding ribs.

An image forming method comprising exposing a heat-developable light-sensitive material comprising a support having thereon at least a light-sensitive silver halide having a silver iodide content of 5 to 100 mol %, a light-insensitive organic silver salt, a heat developing agent, and a binder by means of a scanning optical system having a light source emitting a laser beam having an emission peak between 350 nm and 450 nm to form a latent image on said heat-developable light-sensitive material, heating said heat-developable light-sensitive material to about 80 to 250° C. in a heat development section, and cooling said heat-developable light-sensitive material having been heat treated in said heat development section to or below a development stopping temperature while said heat-developable light-sensitive material is transported in a cooling section.

The present invention provides an electrophotographic carrier which includes a core particle, a first resin layer containing a charge-generating material for coating the core particle, and a second resin layer containing a hole-transporting material for coating the first resin layer. The invention also provides a two-component developer comprising said carrier, and an image-forming process and apparatus using said developer. According to the invention, high quality images can be formed, with excellent image density (especially when developing solid images) and less fogging.

The present invention provides an electrophotographic carrier which includes a core particle, a first resin layer containing a charge-generating material for coating the core particle, and a second resin layer containing a hole-transporting material for coating the first resin layer. The invention also provides a two-component developer comprising said carrier, and an image-forming process and apparatus using said developer. According to the invention, high quality images can be formed, with excellent image density (especially when developing solid images) and less fogging.

The present invention provides a novel naphthol derivative represented by the following general formula (I). The novel naphthol derivative of the present invention is useful as a positively electrifiable charge control agent. The present invention further provides an electrophotographic toner comprising a charge control agent comprising the novel naphthol derivative represented by formula (I).

The invention relates to an inking unit of a rotary press, comprising a film roller. According to the invention, said film roller has a structured outer surface that has a shore hardness ranging between 80 and 90 (D) and a stochastic structure, the latter being incorporated into the outer surface of the film roller by peening.

A magnetic one-component toner of the invention contains at least a binding resin and a magnetic powder, and has a volume average particle size of 6.0 to 9.0 μm, a compressibility of 15 to 50%, and a mean roundness of 0.950 to 0.960. The magnetic powder has at its surface a phosphorus element of 0.10 to 0.50% by weight. This toner is suitable for use in an image forming apparatus provided with a developer carrier made of stainless steel, or an image forming apparatus provided with an amorphous silicon photosensitive material. This toner has high transfer efficiency and less fog, thereby enabling to maintain image density for a long period of time, and form high image-quality image.

An image forming method comprising exposing a heat-developable light-sensitive material comprising a support having thereon at least a light-sensitive silver halide having a silver iodide content of 5 to 100 mol %, a light-insensitive organic silver salt, a heat developing agent, and a binder by means of a scanning optical system having a light source emitting a laser beam having an emission peak between 350 nm and 450 nm to form a latent image on said heat-developable light-sensitive material, heating said heat-developable light-sensitive material to about 80 to 250° C. in a heat development section, and cooling said heat-developable light-sensitive material having been heat treated in said heat development section to or below a development stopping temperature while said heat-developable light-sensitive material is transported in a cooling section.