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Colorless ink

A colorless ink and color-fixing agent technology, which is applied in ink, printing, copying/marking methods, etc., can solve the problems of high cost, restrictions, and narrow selection of functional additives

Inactive Publication Date: 2010-07-07
珠海莱茵柯电子有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the cost of the former is very high, and the latter often requires the added functional additives to be water-soluble and not to react with other components in the ink, and because the nozzle holes of the print head are very small, sometimes the functional additives will block the nozzle holes, As a result, the choice of functional additives that can be used is very narrow, so the method of adding functional additives to the ink is very limited

Method used

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  • Colorless ink
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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0042] The preparation of the colorless ink composition of the present invention is carried out by conventional methods in the industry. Including: mixing the color-fixing agent and water according to the required ratio, and adding optional components, such as surfactants, moisturizing agents, ultraviolet light absorbers and preservatives, etc., and mixing to form the colorless ink of the present invention combination.

[0043] When the colorless auxiliary ink of the present invention is used in combination with inkjet ink, the formed image has surprisingly good water fastness, good light fastness, and very good rub resistance. Moreover, the ink has a simple formula, is easy to prepare, has a very low cost, is convenient to use, and will not have any impact on the print head of the printer.

[0044] testing method

[0045] Water resistance test

[0046] In a C63 model printer purchased from Epson, the ink was jet-printed onto ordinary copy paper, the color blocks were print...

Embodiment

[0055] According to the formulations of Examples 1-8 shown in Table 1-2, the components required for each example were mixed according to the required dosage to prepare the colorless auxiliary ink compositions of each example.

[0056] Under the same conditions, according to the formula of the comparative example shown in the table, each component required for the comparative example was mixed according to the required dosage to prepare the composition of the comparative example.

[0057] According to the test method of the above-mentioned water fastness and light fastness, measure the color density of the color patch printed by the auxiliary ink composition of each embodiment and comparative example, and the range of change of the color density value before and after water immersion thereof in the water fastness test, and The magnitude of change in color density values ​​before and after irradiation in a lightfastness test. The change range of color density is divided into 4 ...

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PUM

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Abstract

The invention provides a colorless auxiliary ink composition. The ink composition comprises at least one water soluble dye-fixing agent and water, wherein the molecules of the dye-fixing agent comprise groups that can be bonded with water soluble ionic groups in the dye molecules in the jet dye ink to form a water insoluble precipitate; and the dosage of the water soluble dye-fixing agent is 1 to 50 percent based on the total weight of the composition. When pre-coated on printing mediums, the colorless auxiliary ink composition is contacted with the color jet ink jetted on the printing mediums later for reaction to form the water insoluble precipitate, so the water proof property of the jet ink is improved.

Description

technical field [0001] The present invention relates to a colorless ink, in particular to a colorless auxiliary ink pre-applied on an inkjet printing medium. Background technique [0002] Water-based inkjet inks can generally be divided into two categories: dye inks and pigment inks. Dye inks are bright in color, but images formed from them have poor water and light fastness. Although the water resistance and light resistance of the image formed by the pigment ink are good, and the vividness is continuously improved, the cost is relatively high. Therefore, dye ink still has a large market demand. [0003] In order to improve the waterproofness and light fastness of images formed by dye inks, technicians in the industry mainly improve ink formulations, such as improving the molecular structure of dyes, or adding functional additives to inks. Among them, the cost of the former is very high, and the latter often requires the added functional additives to be water-soluble and...

Claims

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Application Information

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IPC IPC(8): C09D11/02B41M5/00C09D11/54
Inventor 王风张剑洲
Owner 珠海莱茵柯电子有限公司