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Image forming apparatus, image forming process, recording composition, and cartridge

A composition and image technology, applied in printing and other directions, can solve the problems of easy formation of deposits or deposits, dissatisfaction, lack of consideration, etc.

Inactive Publication Date: 2006-07-26
RICOH KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the disadvantage of pigment-dispersed inks is that deposits or precipitates are easily formed when the solvent evaporates
[0009] However, although these proposals take into account the suppression of discharge bowing at high operating frequencies, they do not take into consideration when the number of scans performed by the head is reduced for high-speed printing especially when using so-called one-pass printing. ) to form an image in which the discharge of the ink bends, and in one-pass printing, prints rows of dots aligned along the main scanning direction in a single head scan
Therefore, the above proposals do not meet the requirements for suppressing discharge bending in one-pass printing, and the status quo needs further improvement and development.

Method used

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  • Image forming apparatus, image forming process, recording composition, and cartridge
  • Image forming apparatus, image forming process, recording composition, and cartridge
  • Image forming apparatus, image forming process, recording composition, and cartridge

Examples

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Embodiment

[0103] Hereinafter, the present invention will be described in detail through examples, but it should be understood that the present invention is not limited thereto.

[0104] 1. Record the preparation of the composition

preparation Embodiment 1

[0106] Preparation Example 1 of the yellow recording composition was prepared by mixing the following components and filtering through a 0.8-μm Teflon (registered trademark) filter.

[0107] C.I. Pigment Yellow 74 10.0% by weight

[0108] 1,3-Butanediol 7.5 wt%

[0109] Glycerin 2.5% by weight

[0110] DISPERNOL TOC 1.0% by weight

[0111] (Surfactant (I) available from NOF Corporation)

[0112] 2-pyrrolidone 2.0% by weight

[0113] Sodium dehydroacetate 0.2% by weight

[0114] Sodium thiosulfate 0.2% by weight

[0115] Ion exchange water balance

[0116] Before use, adjust the pH of the above composition to 10.5 with an aqueous LiOH solution. The average diameter of the pigment contained in Preparation Example 1 of the yellow composition was 95.0 nm. The performance and other information of each recording composition are shown in Table 1.

preparation Embodiment 2

[0118] Preparation Example 2 of the Yellow Recording Composition was prepared by rotating 100 g of the yellow recording composition of Preparation Example 1 and 100 g of zirconia beads in a tank of a ball mill and mixing for 3 hours. The average diameter of the pigment contained in Preparation Example 2 of the yellow composition was 65.0 nm.

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Abstract

Provided is an ink jet image forming process with which discharge bending of nozzle due to colorant deposition does not occur and which yields images without white streaks. Accordingly, provided is an image forming apparatus comprising a recording head which sprays a recording composition containing a colorant dispersion toward a recording medium, which apparatus forms an image on the recording medium by controlling the recording head to scan relatively to the recording medium, wherein the average diameter of the colorant is 70 nm or less and the rows of dots of the image aligned along the main scanning direction are formed with a single scan.

Description

Technical field [0001] The present invention relates to an image forming apparatus that ejects or ejects a recording composition to form an image represented by an ink ejection device. In particular, it relates to an image forming apparatus using a recording composition in which a colorant is dispersed, an image forming method using these devices, a recording produced by this method, a recording composition, and a cartridge containing the recording composition. Background technique [0002] The ink jet recording method that ejects ink droplets to record an image has a simple printing device, and is therefore advantageous in that the cost is low, the device is compact, and the noise is low. Moreover, by using inks containing dyes, this method can obtain printed matter with high color saturation and vivid hues. [0003] However, when this dye-containing ink is printed on ordinary paper, the ink vehicle will bleed along the fiber, and therefore the dye will also bleed. Then, the out...

Claims

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Application Information

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IPC IPC(8): B41J2/01
Inventor 安达浩
Owner RICOH KK