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Method for recycling waste offset printing ink of mix of various colors

A technology of mixing ink and color, applied in ink, color measuring device, household appliances, etc., can solve the problems of inability to recycle, complex hue, waste, etc.

Inactive Publication Date: 2013-10-09
HANGZHOU DIANZI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In offset printing, especially in packaging printing, yellow, magenta, cyan, black, or multiple spot colors are often used to print a product. After printing, the ink fountain and ink roller need to be cleaned, resulting in a large number of Waste ink mixed with multiple colors. These waste inks contain solvents such as cleaning solution, fountain solution, and ethanol, and have complex hues. Most printing companies do not have a good way to deal with them and cannot be recycled. Therefore, they can only use incineration and The landfill method will cause great pollution to the environment and cause waste

Method used

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  • Method for recycling waste offset printing ink of mix of various colors
  • Method for recycling waste offset printing ink of mix of various colors
  • Method for recycling waste offset printing ink of mix of various colors

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0095] Step (1). Recycle the waste ink after cleaning the four-color offset printing machine. The recycled waste ink is composed of CMYK four-color ink mixed together. Use an ink filter to filter the waste ink to remove impurities in the ink, such as ink Ink skin, agglomeration and other impurities in the

[0096] Step (2). Put the filtered waste ink into the distillation kettle, control the temperature of the distillation kettle at 90°C, and distill for 45 minutes. After the water and solvent evaporate, stop the distillation to obtain the mixed ink.

[0097] Step (3). Place the distilled mixed ink in a three-roller ink press, and perform ink rolling twice at a speed of 150 rpm, each time for 30 minutes. After the grinding is completed, take out the mixed ink and pack it Put in a container for later use.

[0098] Step (4). Pour the ground mixed ink into the IGT precision ink injector, use the IGT precision ink injector to apply 1ml of the mixed ink on the rubber roller of the...

Embodiment 2

[0107] Step (1). Recycle the waste offset printing ink containing spot colors, and use an ink filter to filter the waste ink mixed with various colors to remove impurities in the ink.

[0108] Step (2). Put the filtered waste ink into a still, and control the temperature in the still at 95° C., distill for 60 minutes, and stop the distillation after the water and solvent evaporate.

[0109] Step (3). The distilled mixed ink is placed in a three-roll ink press, and the ink is squeezed twice at a speed of 150 rpm, each time for 30 minutes. After the grinding is completed, the mixed ink is taken out and put into a container for later use.

[0110] Step (4). Pour the ground mixed ink into the IGT precision ink injector, use the IGT precision ink injector to apply 1ml of the mixed ink on the rubber roller of the ink printing suitability tester, and use Chenming 200g copper plate The paper is used for solid ink proofing on the ink printing suitability tester; after the proofing is c...

Embodiment 3

[0120] Step (1). Recycle and clean the waste ink mixed with CMYK four-color inks from the four-color offset printing machine, and use the ink filter to filter the waste ink to remove impurities in the ink, such as ink skin, agglomeration and other impurities.

[0121] Step (2). Put the filtered waste ink into the distillation kettle. The temperature of the distillation kettle is controlled at 90°C. Distill for 75 minutes. After the water and solvent evaporate, stop the distillation to obtain the mixed ink.

[0122] Step (3). Place the distilled mixed ink in a three-roller ink press, and perform ink rolling twice at a speed of 100 rpm, each time for 40 minutes. After the grinding is completed, take out the mixed ink and pack it Put in a container for later use.

[0123] Step (4). Pour the ground mixed ink into the IGT precision ink injector, use the IGT precision ink injector to apply 1ml of the mixed ink on the rubber roller of the ink printing suitability tester, and use Che...

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Abstract

The invention discloses a method for recycling waste offset printing ink of a mixture of various colors. At present, burning and covering treatment are adopted for the large amount of waste ink of a mixture of various colors, and thus pollution is caused to the environment. The method comprises the following steps: filtering and distilling the waste ink of a mix of various colors and then performing first grinding to mill the ink; measuring the color and the using amount of a complementary color ink; mixing the mixed ink with the complementary color ink, a carbon black pigment, varnish and a drier and performing second grinding to mill the ink so as to obtain prepared black ink; measuring the color difference and the density variation between the prepared black ink and solid black ink on a standard color card and comparing with the same-batch same-color color difference value and the same-color density deviation value in GB / T7705-2008 solid printing requirements; repeating the operation of the steps (4) to (7) if the requirements are not met, until the conditions are met. The method has the advantages of adoption of common equipment, simple process, capability of realizing recycling of the waste ink, contribution to environmental protection and resource saving.

Description

technical field [0001] The invention relates to a method for recycling and processing offset printing ink, in particular to a method for recycling and processing waste offset printing ink mixed with multiple colors. Background technique [0002] In offset printing, especially in packaging printing, yellow, magenta, cyan, black, or multiple spot colors are often used to print a product. After the printing is completed, the ink fountain and ink roller need to be cleaned, resulting in a large Waste ink mixed with multiple colors. These waste inks contain solvents such as cleaning solution, fountain solution, and ethanol, and have complex hues. Most printing companies do not have a good way to deal with them and cannot be recycled. Therefore, they can only use incineration and The landfill method causes great pollution to the environment and causes waste. Contents of the invention [0003] The purpose of the present invention is to address the shortcomings of the prior art an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D11/02G01J3/46
Inventor 胡更生张正修付延松
Owner HANGZHOU DIANZI UNIV
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