A flexible printing process for corrugated cartons with gradient color patterns
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A corrugated box and flexible printing technology, applied in printing, printing devices, inks, etc., can solve problems such as gaps, achieve stable quality, expand the range of tone, and improve the effect of environmental protection concepts
Active Publication Date: 2022-04-05
安徽美盈森智谷科技有限公司
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Description
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Problems solved by technology
For some flexo printing with complex color levels and gradient patterns, there is still a big gap compared with offset printing.
Method used
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Examples
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Effect test
Embodiment 1
[0030] Preparation of water-based ink: 38g water-soluble solid acrylic resin SK6450, 10g nano-silica, 5g pigment red 112, 1.5g sodium dodecylsulfonate, 0.5g defoamer BYK-023 plus deionized water to make a solid Ink with a content of 52%.
[0031] Gradient Pattern Flexographic Printing For Corrugated Boxes:
[0032] (1) Study the law of dot transfer, and compensate or reduce the highlights and shadows in pre-press processing, so that the highlights and shadows in gradient printing are more delicate.
[0033] (2) Use a cleaning agent to clean the flexographic plate, and avoid contact between the cleaning agent and the surface of the photosensitive layer of the printing plate during the cleaning process.
[0034] (3) For the middle tone of the printed pattern, the circular dot AM screening is used, and the frequency modulation screening is used for the highlight and dark tone parts. The dots in the frequency modulation area can choose the smallest dot that can be reproduced by f...
Embodiment 2
[0039] Embodiment 2 adopts the same printing process as Embodiment 1, and the difference is that the consumption of water-soluble solid acrylic resin and nano-calcium carbonate in the water-based ink is different.
[0040] Preparation of water-based ink: 43g water-soluble solid acrylic resin SK6450, 12g nano-calcium carbonate, 5g pigment red 112, 1.5g sodium dodecylsulfonate, 0.5g defoamer BYK-023 plus deionized water to make solid content for 52% ink.
Embodiment 3
[0042] Example 3 uses the same printing process as Example 1, except that the water-based ink uses different substrate wetting agents.
[0043] Preparation of water-based ink: 38g water-soluble solid acrylic resin SK6450, 10g nano-silica, 5g pigment red 112, 1.5g N-[(1E)-(dimethylamino)methylene]-furamide, 0.5g Defoamer BYK-023 plus deionized water to make ink with a solid content of 52%.
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Abstract
The invention discloses a flexible printing process of gradient color patterns for corrugated cartons, and relates to the technical field of printing technology. The invention uses a flexible printing method to reproduce the printing effect of complex tones, and uses an all-environmental protection printing process to further improve the environmental protection concept of the product itself; through mixed screening The technology expands the tone range of flexo printing, and obtains printed products with richer layers and more stable quality than simple FM screening; by studying the expansion law of dots, in the pre-press processing, some dots in highlights and dark tones are compensated or The reduction makes the highlights and shadows more delicate in gradient printing, and expands the color reproduction range of flexible printing.
Description
Technical field: [0001] The invention relates to the technical field of printing, in particular to a flexible printing process for a gradient color pattern of a corrugated carton. Background technique: [0002] As an important paper packaging container, corrugated boxes have light weight, compression resistance, puncture resistance, tear resistance, cushioning, shock resistance, easy processing and molding and other mechanical properties, as well as good decoration and printing suitability, and have been widely used in the packaging field. . [0003] With the continuous development of society, the printing of corrugated cartons is gradually developing in the direction of high-grade, high-quality, and strong visual effects. In order to improve the fineness of printing, flexographic plates must be used instead of rubber plates for medium and high-end printing plates. In our country, most carton factories still stay in simple text or line draft printing. Compared with offset...
Claims
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Application Information
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