摘要:
In an ink composition comprising a water-soluble dye or a pigment, dissolved or dispersed in an aqueous medium, the ink composition fulfills at least one of the following conditions 1 to 6 in respect of the concentration of metals contained therein: Condition 1; Barium concentration, not more than 4 ppm Condition 2; Zinc concentration, less than 1 ppm Condition 3; Nickel concentration, less than 0.05 ppm Condition 4; Strontium concentration, less than 0.01 ppm Condition 5; Iron concentration, not more than 0.3 ppm Condition 6; Silicon concentration, less than 1.5 ppm.
摘要:
A recording ink including a pigment as a coloring agent, and a solvent which contains at least water. The pigment consists of particles that are dispersed in the solvent, and has an average particle size of 0.05-0.1 .mu.m. Substantially all of the particles of the pigment have particle sizes in a range of 0.01-0.3 .mu.m.
摘要:
An ink composition comprising a dye or pigment, dissolved or dispersed in an aqueous medium, and having acetates in a content less than 90 ppm or formates in a content less than 6 ppm.
摘要:
The object of the invention is to provide a method for cleaning circulation water, which reduces the cost of operation and maintenance as much as possible, without a cumbersome cleaning operation such as by detaching electrode plates from an electrolysis cleaning tank and removing scale from inside the tank, and to provide a device used in this method. Accordingly, the present invention provides a method for cleaning circulation water, comprising the steps of flowing circulation water to be cleaned between electrode plates placed in a face-to-face manner between one another; and applying DC voltage between the electrode plates, allowing one or more metal ions contained in the circulation water to be precipitated onto the negative electrode plates by electrolysis, to clean the circulation water, wherein the electrode plates used are made of titanium plates, and wherein a desired amount of current flows, while an anodized oxide coating formed on the surface of the positive electrode plates is compulsively subject to dielectric breakdown by increasing the voltage applied to the anodized oxide coating. FIG. 1 is a representative drawing.
摘要:
An ink for ink-jet recording is provided which enables high quality printing at a fast speed. The ink is also suitable for use in an ink-jet recording head employed in a line head method. The ink for ink-jet recording includes at least a coloring agent, ethylene glycol, propylene glycol propyl ether and water. The amount of ethylene glycol with respect to the total ink amount is about 5 wt. % to about 30 wt. %, and the amount of propylene glycol propyl ether with respect to the total ink amount is about 30 wt. % to about 50 wt. %. Further, the total amount of ethylene glycol and propylene glycol propyl ether with respect to the total ink amount is about 45 wt. % to about 60 wt. %.
摘要:
A developing apparatus having a developer carrying member carrying developer including toner, a developer regulating member regulating the layer thickness of the developer carried on the developer carrying member, and a lubricant provided in a contact portion between the carrying member and the regulating member with the developer being not present on the carrying member, wherein the lubricant includes a first polymer particle which is of a spherical shape having an average degree of circularity of 0.90 or greater and is of a polarity opposite to the charging polarity of the toner, and a second polymer particle of a scalelike shape and of the same polarity as the charging polarity of the toner.
摘要:
A pretreatment liquid for ink-jet recording by applying the pretreatment liquid to a recording medium, the pretreatment liquid including fine particles and a solvent. Specifically, a contact angle between the pretreatment liquid and a surface of the recording medium is greater than or equal to about 75 degrees.
摘要:
An inkjet head may comprise an ejection port which ejects ink and an ink flow path which supplies the ink to the ejection port. The inkjet head may also comprise an ejection actuator which supplies ejection energy to the ink in the ink flow path. The ejection energy may cause the ink to be ejected from the ejection port. The inkjet head may also comprise a wall portion. The wall portion may be located at a position farther from the ejection port along the ink flow path with respect to a position at which the ejection energy is supplied. The wall portion may define an inner wall surface of the ink flow path. The wall portion may deform to decrease a cross section of the ink flow path in a direction orthogonal to an ink-flow direction as a temperature of the ink in the ink flow path increases. The wall portion may deform to increase a cross section of the ink flow path in a direction orthogonal to an ink-flow direction as the temperature of the ink in the ink flow path decreases.
摘要:
The object of the invention is to provide a method for cleaning circulation water, which reduces the cost of operation and maintenance as much as possible, without a cumbersome cleaning operation such as by detaching electrode plates from an electrolysis cleaning tank and removing scale from inside the tank, and to provide a device used in this method. Accordingly, the present invention provides a method for cleaning circulation water, comprising the steps of flowing circulation water to be cleaned between electrode plates placed in a face-to-face manner between one another; and applying DC voltage between the electrode plates, allowing one or more metal ions contained in the circulation water to be precipitated onto the negative electrode plates by electrolysis, to clean the circulation water, wherein the electrode plates used are made of titanium plates, and wherein a desired amount of current flows, while an anodized oxide coating formed on the surface of the positive electrode plates is compulsively subject to dielectric breakdown by increasing the voltage applied to the anodized oxide coating. FIG. 1 is a representative drawing.
摘要:
An ink-jet ink-receptive composition, which resolves problems such as blurring of images and show-through occurring when water soluble dye inks are employed on uncoated paper such as plain paper or ordinary postcards and which provide a high density and high quality image, contains a specific silica particle aggregate and polyvinylpyrrolidone.