CN112060793B - Corrugated carton gradient color pattern flexible printing process - Google Patents
Corrugated carton gradient color pattern flexible printing process Download PDFInfo
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- CN112060793B CN112060793B CN202010759538.6A CN202010759538A CN112060793B CN 112060793 B CN112060793 B CN 112060793B CN 202010759538 A CN202010759538 A CN 202010759538A CN 112060793 B CN112060793 B CN 112060793B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M1/00—Inking and printing with a printer's forme
- B41M1/02—Letterpress printing, e.g. book printing
- B41M1/04—Flexographic printing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M1/00—Inking and printing with a printer's forme
- B41M1/14—Multicolour printing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M1/00—Inking and printing with a printer's forme
- B41M1/26—Printing on other surfaces than ordinary paper
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D11/00—Inks
- C09D11/02—Printing inks
- C09D11/03—Printing inks characterised by features other than the chemical nature of the binder
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D11/00—Inks
- C09D11/02—Printing inks
- C09D11/03—Printing inks characterised by features other than the chemical nature of the binder
- C09D11/033—Printing inks characterised by features other than the chemical nature of the binder characterised by the solvent
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D11/00—Inks
- C09D11/02—Printing inks
- C09D11/10—Printing inks based on artificial resins
- C09D11/106—Printing inks based on artificial resins containing macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- C09D11/107—Printing inks based on artificial resins containing macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds from unsaturated acids or derivatives thereof
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Printing Methods (AREA)
- Inks, Pencil-Leads, Or Crayons (AREA)
Abstract
The invention discloses a corrugated case gradient color pattern flexible printing process, which relates to the technical field of printing, and the invention uses a flexible printing mode to reproduce a complex tone printing effect, and uses a full-environment-friendly printing process to improve the environment-friendly concept of a product; the gradation range of the flexo printing is enlarged by a mixed screening technology, and a printing product with richer layers and more stable quality is obtained compared with a single frequency modulation screening technology; by researching the expansion rule of the dots, the dots of the highlight and dark tone parts are compensated or reduced in the prepress treatment, so that the gradation expression of the highlight and dark tone in the gradual change printing is more exquisite, and the reproduction range of the colors of the flexible printing is expanded.
Description
The technical field is as follows:
the invention relates to the technical field of printing, in particular to a corrugated case gradient color pattern flexible printing process.
Background art:
as an important paper packaging container, the corrugated case has the mechanical properties of light weight, pressure resistance, puncture resistance, tear resistance, buffering, shock resistance, easy processing and forming and the like, and good decoration printability, and is widely applied to the packaging field.
With the continuous development of society, the printing of corrugated paper boxes is gradually developed towards high-grade, high-quality and colorful paper box with strong visual effect. To improve the printing delicacy, the medium-high grade only needs to replace a rubber plate with a flexible plate for printing plate making. In China, most carton factories still remain on simple text or line draft printing. Flexography with complex patterns of gradient colors for some color levels still has a large gap compared to offset printing.
The offset printing adopts oil-water incompatible ink, and because the ink and fountain solution contain volatile organic solvent harmful to human body, under the consideration of environmental protection, more and more terminal enterprises begin to try to solve the problem of converting the offset printing mode into the flexo printing mode. However, in order to achieve a higher gradation reduction effect of a printed image, a flexo printing process needs to be studied.
The invention content is as follows:
the technical problem to be solved by the invention is to provide a corrugated case gradient color pattern flexible printing process, which adopts a mixed screening mode to expand the reproduction range of flexible printing colors, obtain printed products with richer layers and more stable quality, and ensure the environmental protection of the printing process.
The technical problem to be solved by the invention is realized by adopting the following technical scheme:
a corrugated case gradient color pattern flexible printing process comprises the following process steps:
(1) the transfer rule of the dots is researched, and the dots of the highlight and dark tone parts are compensated or reduced in an expanding way in the prepress treatment, so that the gradation expression of the highlight and dark tone in the gradual change printing is more exquisite;
(2) cleaning the flexible plate by using a cleaning agent, wherein the cleaning agent is prevented from contacting the surface of the photosensitive layer of the printing plate in the cleaning process;
(3) the middle tone of the printed pattern is screened by adopting circular screen dot amplitude modulation, the highlight and dark tone parts are screened by adopting frequency modulation, and the screen dot in a frequency modulation area can be the minimum screen dot which can be reproduced by flexographic printing;
(4) mounting the flexible plate on a printing machine, transferring the water-based ink to the flexible printing machine through a metal anilox roller, and printing patterns on the pretreated corrugated paper box;
(5) and (4) inspecting, removing defective products and warehousing qualified products.
The frequency modulation screening is adopted at the highlight and dark tone part, so that the phenomenon that the screen dots are lost in a highlight area or serious screen dot merging occurs in a dark tone area in the traditional screening can be avoided, more highlight and dark tone layers can be copied, and the tone range of the flexo printing is enlarged. The traditional amplitude modulation screening is adopted in the range with larger contrast in the middle part, so that the advantage of stable printing transmissibility of the traditional screening net points is kept, and the basic requirements on printing equipment and printing process conditions are reduced, so that a printed product with richer layers and more stable quality can be obtained under common printing conditions compared with a printed product with pure amplitude modulation screening.
The water-based ink is prepared from 30-50 parts of water-soluble solid acrylic resin, 5-15 parts of nano filler, 1-10 parts of pigment, 0.5-5 parts of base material wetting agent, 0.1-2 parts of defoaming agent and deionized water, and the solid content is 40-60%.
The nano filler is selected from one of nano silicon dioxide, nano calcium carbonate and nano talcum powder, and the average grain diameter is 15-40 nm.
The defoaming agent is a BYK type defoaming agent.
The base material wetting agent is a sulfonate wetting agent.
The substrate wetting agent is N- [ (1E) - (dimethylamino) methylene ] -furoamide.
The substrate wetting agent is tert-butyloxycarbonyl-L-alanine-N-succinimide ester.
The substrate wetting agent is used for reducing the surface tension of the ink and improving the adhesion of the ink to a substrate. The sulfonate wetting agent belongs to known common wetting agents, and the invention also selects N- [ (1E) - (dimethylamino) methylene ] -furfuryl amide as the wetting agent, and the action effect superior to the sulfonate wetting agent is expected to be obtained.
N- [ (1E) - (dimethylamino) methylene ] -furoamide having CAS number 1417367-79-3; Boc-L-alanine-N-succinimidyl ester with CAS number 3392-05-0 is commonly used as chemical or pharmaceutical intermediate.
The invention self-prepares a novel water-based ink, avoids the pollution of volatile organic compounds by applying the ink, and improves the printing operation environment; the ink has good re-solubility, and can ensure that an ink film adhered to an ink tank, a printing plate mesh and a scraper is re-dissolved into the ink due to drying in the printing process, thereby avoiding the problems of blocking mesh points and reducing the printing efficiency, and further realizing the reproduction of high-quality printing patterns.
The invention has the beneficial effects that:
(1) the invention uses the flexible printing mode to reproduce the printing effect of complex tone, and uses the full environment-friendly printing process to further improve the environment-friendly concept of the product.
(2) The invention enlarges the gradation range of the flexo printing by the mixed screening technology, and obtains the printing product with richer layers and more stable quality than the single frequency modulation screening technology.
(3) By researching the expansion rule of the dots, the invention compensates or reduces the dots of the highlight and dark tone parts in the prepress treatment, so that the gradation expression of the highlight and dark tone in the gradual change printing is more exquisite, and the reproduction range of the flexible printing color is expanded.
The specific implementation mode is as follows:
in order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.
The water-soluble solid acrylic resin SK6450 is obtained from Shanghai Shuaike chemical Co., Ltd. The nano silicon dioxide is from Beijing Jia' an Heng technology ltd, and the average grain diameter is 15 nm. The nano calcium carbonate is from Beijing Deke island gold science and technology Limited, and has an average particle size of 20 nm.
Example 1
Preparation of water-based ink: 38g of water-soluble solid acrylic resin SK6450, 10g of nano-silica, 5g of pigment red 112, 1.5g of sodium dodecyl sulfate, 0.5g of defoaming agent BYK-023 and deionized water are added to prepare the ink with the solid content of 52%.
Flexible printing of the gradient color pattern of the corrugated case:
(1) the transfer rule of the dots is researched, and the dots of the highlight and dark tone parts are expanded, compensated or reduced in the prepress treatment, so that the highlight and dark tone layers in the gradual change printing are more exquisite in expression.
(2) The flexible plate is cleaned by using the cleaning agent, and the cleaning agent is prevented from contacting the surface of the photosensitive layer of the printing plate in the cleaning process.
(3) The middle tone of the printed pattern is screened by adopting circular screen dot amplitude modulation, the highlight and dark tone parts are screened by adopting frequency modulation, and the screen dot in a frequency modulation area can be the minimum screen dot which can be reproduced by flexographic printing;
(4) and (3) mounting the flexible plate on a printing machine, transferring the water-based ink to the flexible printing machine through a metal anilox roller, and printing patterns on the corrugated box after pretreatment.
(5) And (4) inspecting, removing defective products and warehousing qualified products.
The reproducible color value range is more than or equal to 85 percent, and the dot enlargement (50 percent) is less than or equal to 20 percent.
Example 2
Example 2 the same printing process as in example 1 was used, except that the water-soluble solid acrylic resin and the nano calcium carbonate were used in different amounts in the aqueous ink.
Preparation of water-based ink: 43g of water-soluble solid acrylic resin SK6450, 12g of nano calcium carbonate, 5g of pigment red 112, 1.5g of sodium dodecyl sulfate, 0.5g of defoaming agent BYK-023 and deionized water are added to prepare the ink with the solid content of 52 percent.
Example 3
Example 3 the same printing process was used as in example 1 except that different substrate wetting agents were used for the aqueous ink.
Preparation of water-based ink: 38g of water-soluble solid acrylic resin SK6450, 10g of nano-silica, 5g of pigment Red 112, 1.5g of 1.5g N- [ (1E) - (dimethylamino) methylene ] -furfuryl amide, 0.5g of defoamer BYK-023 and deionized water are added to prepare the ink with the solid content of 52%.
Example 4
Example 4 the same printing process was used as in example 1 except that different substrate wetting agents were used for the aqueous ink.
Preparation of water-based ink: 38g of water-soluble solid acrylic resin SK6450, 10g of nano-silica, 5g of pigment red 112, 1.5g of tert-butyloxycarbonyl-L-alanine-N-succinimide ester, 0.5g of defoaming agent BYK-023 and deionized water are added to prepare the ink with the solid content of 52%.
The initial drying of the inks in the examples described above was determined in accordance with standard GB/T13217.5-2008. The drying speed is too high, the printing ink can be skinned and pasted on the surface of the printing plate, and the phenomena of ink accumulation and poor gloss of the printed matter can occur; the drying speed is too slow, and the back of the printed matter may be dirty and transferred.
The surface tension of the ink was measured using a DCAT 21SF surface tension meter, manufactured by beijing aldefield colloid chemical instruments ltd. The smaller the surface tension, the better the wetting and spreading properties of the ink; the greater the surface tension, the poorer the wet spreadability of the ink.
TABLE 1 initial drying and surface tension of the inks
| Numbering | Initial dryness, 25 deg.C | Surface tension |
| Example 1 | 24mm/30s | 6.79×10-2N/m |
| Example 2 | 28mm/30s | 8.23×10-2N/m |
| Example 3 | 32mm/30s | 2.46×10-2N/m |
| Example 4 | 35mm/30s | 1.50×10-2N/m |
As can be seen from table 1, the surface tension of the ink is directly affected by the selection of different substrate wetting agents, and compared with sodium dodecyl sulfate, N- [ (1E) - (dimethylamino) methylene ] -furfuryl amide and t-butoxycarbonyl-L-alanine-N-succinimidyl ester can significantly reduce the surface tension of the ink, improve the initial drying property of the ink, and suitably increase the drying speed of the ink.
The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (3)
1. The corrugated carton gradual change color pattern flexible printing process is characterized in that: the method comprises the following process steps:
(1) the transfer rule of the dots is researched, and the dots of the highlight and dark tone parts are compensated or reduced in an expanding way in the prepress treatment, so that the gradation expression of the highlight and dark tone in the gradual change printing is more exquisite;
(2) cleaning the flexible plate by using a cleaning agent, wherein the cleaning agent is prevented from contacting the surface of the photosensitive layer of the printing plate in the cleaning process;
(3) the middle tone of the printed pattern is screened by adopting circular screen dot amplitude modulation, the highlight and dark tone parts are screened by adopting frequency modulation, and the screen dot in a frequency modulation area can be the minimum screen dot which can be reproduced by flexographic printing;
(4) mounting the flexible plate on a printing machine, transferring the water-based ink to the flexible printing machine through a metal anilox roller, and printing patterns on the pretreated corrugated paper box;
(5) inspecting, removing defective products, and warehousing qualified products;
the water-based ink is prepared from 30-50 parts of water-soluble solid acrylic resin, 5-15 parts of nano filler, 1-10 parts of pigment, 0.5-5 parts of base material wetting agent, 0.1-2 parts of defoaming agent and deionized water, and the solid content is 40-60%;
the substrate wetting agent is N- [ (1E) - (dimethylamino) methylene ] -furoamide or tert-butoxycarbonyl-L-alanine-N-succinimidyl ester.
2. The corrugated box gradient color pattern flexible printing process according to claim 1, wherein: the nano filler is selected from one of nano silicon dioxide, nano calcium carbonate and nano talcum powder, and the average grain diameter is 15-40 nm.
3. The corrugated box gradient color pattern flexible printing process according to claim 1, wherein: the defoaming agent is a BYK type defoaming agent.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010759538.6A CN112060793B (en) | 2020-07-31 | 2020-07-31 | Corrugated carton gradient color pattern flexible printing process |
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| CN202010759538.6A CN112060793B (en) | 2020-07-31 | 2020-07-31 | Corrugated carton gradient color pattern flexible printing process |
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| Publication Number | Publication Date |
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| CN112060793A CN112060793A (en) | 2020-12-11 |
| CN112060793B true CN112060793B (en) | 2022-04-05 |
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| CN112622461A (en) * | 2020-12-16 | 2021-04-09 | 福建长信纸业包装有限公司 | Optimized control method for face color of flexible printing figure |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101941307A (en) * | 2010-06-09 | 2011-01-12 | 武汉华艺柔印环保科技有限公司 | Method for manufacturing wide-width color flexible preprinted corrugated carton |
| CN103649834A (en) * | 2011-07-15 | 2014-03-19 | 麦克德米德印刷方案股份有限公司 | Method for improving print performance of flexographic printing elements |
| CN105479957A (en) * | 2014-09-19 | 2016-04-13 | 丹阳市华兴纸箱有限公司 | Flexible printing process for corrugated carton |
| CN107924120A (en) * | 2015-08-18 | 2018-04-17 | 麦德美图形解决方案有限责任公司 | The method that mixed printing site is produced in flexographic printing plates |
| CN111434101A (en) * | 2017-10-27 | 2020-07-17 | 爱克发有限公司 | Digital halftoning using spiral dots |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3424739A1 (en) * | 2017-07-05 | 2019-01-09 | The Procter & Gamble Company | Method of printing 3d-microoptic images on packaging systems |
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- 2020-07-31 CN CN202010759538.6A patent/CN112060793B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101941307A (en) * | 2010-06-09 | 2011-01-12 | 武汉华艺柔印环保科技有限公司 | Method for manufacturing wide-width color flexible preprinted corrugated carton |
| CN103649834A (en) * | 2011-07-15 | 2014-03-19 | 麦克德米德印刷方案股份有限公司 | Method for improving print performance of flexographic printing elements |
| CN105479957A (en) * | 2014-09-19 | 2016-04-13 | 丹阳市华兴纸箱有限公司 | Flexible printing process for corrugated carton |
| CN107924120A (en) * | 2015-08-18 | 2018-04-17 | 麦德美图形解决方案有限责任公司 | The method that mixed printing site is produced in flexographic printing plates |
| CN111434101A (en) * | 2017-10-27 | 2020-07-17 | 爱克发有限公司 | Digital halftoning using spiral dots |
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