CN103009838A - Printing process for realizing matte effect through lithography and flexography - Google Patents
Printing process for realizing matte effect through lithography and flexography Download PDFInfo
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- CN103009838A CN103009838A CN201210582617XA CN201210582617A CN103009838A CN 103009838 A CN103009838 A CN 103009838A CN 201210582617X A CN201210582617X A CN 201210582617XA CN 201210582617 A CN201210582617 A CN 201210582617A CN 103009838 A CN103009838 A CN 103009838A
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Abstract
The invention relates to a printing process for realizing a matte effect through lithography and flexography and belongs to the field of packaging and printing processes. The traditional offset printing press is generally provided with an online glazing unit with a flexography method; an initially dried or completely dried ink undercoat layer with lower surface tension is printed on a printing stock by using an offset printing process; and then an ink layer, of which the surface tension is 0.004-0.01 N/m larger than that of the undercoat layer, is printed on the undercoat layer by using the flexography method; when flexography ink is printed to the surface of the ink on the undercoat layer, the flexography ink layer is retracted because the surface tension of the flexography ink layer is larger than that of the undercoat layer, so that an obvious matte texture can be obtained after the flexography ink is cured. By controlling the surface tension difference between the undercoat layer and the wet flexography ink, the shrinkage degree of the flexography ink is controlled; and through the adjustments such as inking quantity adjustment and color adjustment, the thickness, color and matte sense of the whole matte effect can be rapidly adjusted.
Description
Technical field
The present invention relates to a kind of lithographic printing in conjunction with the combined printing mode of flexographic printing, the frosted finish effect that realization only had serigraphy to realize originally belongs to the package printing process field.
Background technology
Lithographic printingBe to use the formes such as PS version, deep-etch plate, multilayer metal plate, albumen version, stone plate, its picture and text part and blank parts are almost in one plane utilized mode oily, that the immiscible principle of water is printed.At first with damping roller forme is coated with moisture film during printing, water then forms water membrane in the forme blank parts, does not then almost have moisture film in the picture and text part.Then be coated with printing ink with ink roller to forme, at this moment have the blank parts of moisture film not adhere to printing ink, and do not have the picture and text part of moisture film can adsorb printing ink.When the rubber contact squeeze of forme and blanket cylinder, just the printing ink of forme picture and text part is transferred on the blanket.By blanket cylinder the printing ink on the blanket is transferred on the stock again.Finish a print cycle.Because the picture and text on the forme are transferred to first on the blanket of blanket cylinder, transfer on the paper of impression cylinder again, have passed through a blanket cylinder in the printing process, so,
Lithographic printing is also referred to as offset printing.Offset printing has the alignment precision height, and China ink layer is thin, and print speed printing speed is fast, and the plate-making expense is cheap, and institute prints that product level is plentiful, contrast is enriched, color is soft, the advantage that print quality is high.
Flexographic printing:Use flexographic plate, transmit a kind of mode of printing that printing ink is executed seal by anilox roller.Flexographic printing is adoptable to be cylinder material, not only can realize the printed on both sides of printable fabric, can also finish simultaneously the work such as on line glazing (perhaps overlay film), gold stamping, cross cutting, waste discharge, rolling.Greatly shorten the production cycle, saved human and material resources and financial resources, reduced production cost, improved economic benefit.Printing
Speed is fast, and print quality is good, and printing precision can reach 150 line/inches, and printed matter levels are rich, in bright gay color, and good visual effect is particularly suitable for the requirement of packages printing.
Serigraphy:Utilize the saturating printing ink of screen printing forme picture and text part mesh, the non-graphic part mesh not basic principle of strike through prints.Pour printing ink at screen printing forme one end during printing, apply certain pressure with scraping the printing ink position of scraper plate on screen printing forme, move towards the screen printing forme other end simultaneously.Printing ink is expressed on the stock from the mesh of picture and text part by scraper plate in movement.Owing to the viscous effect of printing ink makes the trace set within limits, the printing process middle scraper is line with screen printing forme and stock all the time and contacts, contact wire moves with scraper plate and mobile, owing to keep certain gap between screen printing forme and the stock, so that the screen printing forme in when printing produces reaction force to scraper plate by self tension force, this reaction force is called screen resilience.Because the effect of screen resilience makes screen printing forme and stock only be portable line and contact, and screen printing forme other parts and stock is disengaged position.Make the motion of printing ink and silk screen fracture, guaranteed the printed dimensions precision and avoided the set-off stock.Lifted after scraper plate is scraped the whole space of a whole page, screen printing forme also lifts simultaneously, and printing ink is gently scraped back initial position.So far be a print stroke.
Silk-screen printing technique has the restriction that is not subjected to the stock size and shape, almost can print on any surface by shape, and black bed thickness, covering power is strong, and third dimension is strong, and mode of printing is versatile and flexible, and plate-making convenience, low price, technology are easy to grasp.
More than three kinds of mode of printings advantage is respectively arranged, but also Shortcomings of prior art, main manifestations is as follows:
The product China ink layer that lithographic printing and flexo are printed is thin, and the picture and text third dimension of printing is not strong, can't show for ask for something texture and the strong picture and text of third dimension, and particularly some particular abrasive effects can't realize.Serigraphy is because forme is out of shape, and a cover precision is not high, and lines are fine and smooth not, and because black bed thickness, the ink consumption amount is large, and printing ink is difficult dry thorough, and volatile solvent is residual greatly in the China ink layer, and there is certain pollution risk in packing material.In addition, serigraphy speed is slower, and overall printing efficiency is not high.
Summary of the invention
The object of the invention is to solve the weak point that above-mentioned prior art exists, provide a kind of lithographic printing is combined with flexographic printing, to realize the frosted finish effect of similar serigraphy, realize simultaneously typography high-speed, the high-accuracy sleeve position.
For achieving the above object, the present invention has adopted following technical scheme:
Existing offset press generally all possesses the online gloss-providing unit of flexographic printing mode, the wet China ink layer that the present invention is based on high surfaces tension force energy of attachment on than the dried China ink layer of low surface tension produces contraction principle, at first adopt offset printing process after stock is printed a kind of surface drying or done solid work, to have the printing ink priming coat of low surface tension, then priming coat adopt the flexo mode print one deck solidify front surface tension force greater than the wet ink layer of cured base coating surface tension force as top coat, control the shrinkage degree of flexo printing ink by adjusting priming coat and top coat surface tension extent, in conjunction with the inking amount, the usual manner adjustment such as color can be adjusted the thickness of whole frosted finish effect quickly, color and sand sense.
Concrete processing step is as follows:
(1), adopt the mode printing rubber printing ink of offset printing at stock, just do through printing ink or finish-drying after, form priming coat;
Wettability was good before described offset ink was selected and solidified, and solidified rear surface tension force less than the printing ink of 0.03N/m; Concrete data of solidifying rear surface tension force can suitably be adjusted according to required contractive effect difference;
Described priming coat can according to printing ink ink film thickness and contractive effect requirement, adopt repeatedly double exposure of the dried mode of printing of wet pressing in the print couple allowed band.
(2), adopt the mode of flexo to print flexo printing ink at priming coat, forming top coat through behind the finish-drying;
The surface tension of flexo printing ink should be than the large 0.004～0.01N/m of surface tension of cured offset printing ink before the described curing, like this when uncured flexo ink printing during to the priming coat ink pellet surface of having solidified, can shrink because the wetting convergent force of top coat is large, can produce corresponding frosted finish effect by the surface tension of adjusting inking amount and two kinds of printing ink is poor;
For guaranteeing that the flexo ink surface tension is stable, preferably adopt the UV cured resin class printing ink that does not contain volatile solvent.
Typography of the present invention can produce following beneficial effect: 1, high speed printing, greatly improved production efficiency, and can enhance productivity more than 200%; 2, a cover precision is high, adopts offset printing lithographic plate and flexographic plate cover position, has avoided being out of shape because of silk-screen plate in the silk-screen problem of the cover position low precision that causes; The 3 frosted finish effect printings by the thick China ink layer of offset press realization have improved the offset press range of application, have reduced the buying of enterprise to screen printing apparatus, have reduced operation cost of enterprises.
Description of drawings
Fig. 1: typography structural representation of the present invention.
In the drawings, 1, stock, 2, priming coat, 3, top coat.
The specific embodiment
Referring to accompanying drawing, provide the specific embodiment of the present invention, be used for formation of the present invention is further specified.
Frosted finish effect technique adopts the offset printing mode to print three times and forms priming coat 2 with reference to figure 1.A wherein printing colouring, the upper low printing ink of rear surface tension force that solidifies of two times printings, low surface tension printing ink is gone up in three times printings again one time, and is even to guarantee printing ink.Finishing coat adopts flexo mode printing UV gloss oil to form top coat.Concrete steps are as follows:
The first step, primary coat
1, a primary coat: adopt the offset printing colour cell to brush one times primary coat with planography way at the pattern position seal of design on stock 1 surface.
One time primary coat printing ink requires: ink surface tension was greater than the uncured front surface tension force of primary coat printing ink second time after (1) printing ink was just done; (2) amount is about 2g/ ㎡ on the printer's ink layer, print speed printing speed when 100m/min, adopt 120-180W/cm the UV light irradiation can finish-drying; (3) good ink stability and printability.Interpolation colorant or common offset printing UV printing ink can be so that frosted finish effect embody different form and aspect in this primary coat.
2, two times primary coats: adopt the offset printing colour cell in a primary coat, to print two time primary coat with the wet double exposure mode of wet pressing with planography way.
Two times primary coat printing ink requires: (1) uncured front surface tension force is 0.02 to 0.024N/m, solidifies rear surface tension force about 0.028N/m; (2) amount is about 2g/ ㎡ on the printer's ink layer, and print speed printing speed adopts the UV light irradiation energy finish-drying of 120-180W/cm when 100m/min.Different frosted finish effect characteristics printing ink according to design need have good permeability or light-proofness.
3, three times primary coats: adopt the offset printing colour cell in two times primary coats, to print three time primary coat with the wet double exposure mode of wet pressing with planography way.
Three times primary coat printing ink requires with two times primary coat printing ink.
The main purpose of printing two times primary coats and three times primary coats is for improving about offset printing ink layer thickness to 12 micron, so that whole technique can reach the ink film thickness of about 20 microns of serigraphys after finishing.
4, primary coat is dry: after primary coat was finished, employing power was that the offset printing unit UV lamp of 220W/cm carries out the drying processing, separates out to guarantee the surface tension controlling agent in the printing ink, and surface tension is controlled at about 0.028N/m.
Second step, face are coated with
1, the offset printing gloss-providing unit adopts 200 line anilox roll, and the gentle version in resin location positions the gentle version of printing UV printing ink to the pattern position of design, forms top coat 3.
This gentle version UV printing ink requires: (1) uncured front ink surface tension is about 0.033N/m; (2) amount is 5g/ ㎡ on the printer's ink layer, and print speed printing speed adopts the UV light irradiation energy finish-drying of 120-180W/cm when 100m/min; (3) this ink transparency is high, good fluidity, and surface gloss is high.
Because this ink surface tension is higher than the priming coat ink surface tension of having solidified, thus this gentle version UV printing ink with priming coat printing ink wet processes in can shrink because of the cohesive force effect generation frosted finish effect.Ink film thickness can reach about 10 microns when flexo directly was printed in high surface tension stock, when printing during with the priming coat of low surface tension, make its ink film thickness surpass 15 microns because the China ink layer shrinks, thereby reach screen printed inks layer effect, produce and feel than the rival.
2, solidify dry: paper by the offset printing gloss-providing unit after, thoroughly dry through the lengthening UV lamp of 3 220W/cm, form final frosted finish effect.
Typography of the present invention can produce following beneficial effect: 1, high speed printing, greatly improved production efficiency, and can enhance productivity more than 200%; 2, a cover precision is high, adopts offset printing lithographic plate and flexographic plate cover position, has avoided being out of shape because of silk-screen plate in the silk-screen problem of the cover position low precision that causes; The 3 frosted finish effect printings by the thick China ink layer of offset press realization have improved the offset press range of application, have reduced the buying of enterprise to screen printing apparatus, have reduced operation cost of enterprises.
Claims (6)
1. a lithographic printing is realized the typography of frosted finish effect in conjunction with flexographic printing, the wet China ink layer that is based on high surfaces tension force energy of attachment on than the dried China ink layer of low surface tension produces contraction principle, it is characterized in that, at first adopt offset printing process after stock is printed a kind of drying, to have the printing ink priming coat of low surface tension, then priming coat adopt the flexo mode print one deck solidify front surface tension force greater than the wet ink layer of cured base coating surface tension force as top coat, control the shrinkage degree of flexo printing ink by adjusting priming coat and top coat surface tension extent, in conjunction with the inking amount, the color usual manner is adjusted, and can adjust quickly the thickness of whole frosted finish effect, color and sand sense.
2. a kind of lithographic printing is characterized in that in conjunction with the typography of flexographic printing realization frosted finish effect concrete processing step is as follows as claimed in claim 1:
(1), adopt the mode printing rubber printing ink of offset printing at stock, just do through printing ink or finish-drying after, form priming coat;
(2), adopt the mode of flexo to print flexo printing ink at priming coat, forming top coat through behind the finish-drying.
3. a kind of lithographic printing is characterized in that in conjunction with the typography of flexographic printing realization frosted finish effect as claimed in claim 2
In the step (1),
Wettability was good before described offset ink was selected and solidified, and solidified rear surface tension force less than the printing ink of 0.03N/m.
4. a kind of lithographic printing is characterized in that in conjunction with the typography of flexographic printing realization frosted finish effect as claimed in claim 2
In the step (1),
Described priming coat adopts repeatedly double exposure of the dried mode of printing of wet pressing according to printing ink ink film thickness and contractive effect requirement in the print couple allowed band.
5. a kind of lithographic printing is characterized in that in conjunction with the typography of flexographic printing realization frosted finish effect as claimed in claim 2
In the step (2),
The surface tension of flexo printing ink should be than the large 0.004～0.01N/m of surface tension of cured offset printing ink before the described curing.
6. a kind of lithographic printing is characterized in that in conjunction with the typography of flexographic printing realization frosted finish effect as claimed in claim 2
In the step (2),
Described flexo printing ink adopts the UV cured resin class printing ink that does not contain volatile solvent.
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| CN201210582617XA CN103009838A (en) | 2012-12-28 | 2012-12-28 | Printing process for realizing matte effect through lithography and flexography |
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| CN201210582617XA CN103009838A (en) | 2012-12-28 | 2012-12-28 | Printing process for realizing matte effect through lithography and flexography |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104476917A (en) * | 2014-12-31 | 2015-04-01 | 陈淼 | Laminating polishing heat energy recovery unit |
| CN104553406A (en) * | 2014-09-30 | 2015-04-29 | 贵州劲嘉新型包装材料有限公司 | Printing method for realizing frosted effect by using offset printing press |
| CN105882172A (en) * | 2016-05-10 | 2016-08-24 | 深圳市睿同科技有限公司 | Novel flexographic printing method |
| CN106626844A (en) * | 2016-11-22 | 2017-05-10 | 深圳劲嘉集团股份有限公司 | Offset print production process of surface effect treatment of printed material |
| CN107953689A (en) * | 2017-11-21 | 2018-04-24 | 浙江美浓世纪集团有限公司 | A kind of improved method that the online glazing group of offset printing is used for the printing of flexo background color |
| CN108668521A (en) * | 2015-12-15 | 2018-10-16 | 爱克发有限公司 | Use the additivity manufacturing method of the dynamic optical projection for flexographic printing mother matrix |
| CN109263321A (en) * | 2018-08-21 | 2019-01-25 | 中山市启晨高分子科技有限公司 | Process for curing offset printing depth of field effect by ultraviolet light |
| CN109334289A (en) * | 2018-09-06 | 2019-02-15 | 天津宜药印务有限公司 | Sand dye transfer dataller's process |
| CN110254031A (en) * | 2019-06-14 | 2019-09-20 | 云南侨通包装印刷有限公司昆明分公司 | A kind of frosted finish effect technique of offset lithography |
| CN110335537A (en) * | 2019-08-22 | 2019-10-15 | 郑州市晶森彩印有限公司 | The resin wheel high temperature resistant circular tag that a variety of printing technologies combine |
| CN112319079A (en) * | 2020-09-25 | 2021-02-05 | 广州丽盈塑料有限公司 | Method for flexo printing three-dimensional effect |
| CN112937140A (en) * | 2021-03-31 | 2021-06-11 | 青岛嘉泽包装有限公司 | UV offset printing process for producing cigarette trademark paper by integrating flexo printing and offset printing |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104553406A (en) * | 2014-09-30 | 2015-04-29 | 贵州劲嘉新型包装材料有限公司 | Printing method for realizing frosted effect by using offset printing press |
| CN104553406B (en) * | 2014-09-30 | 2016-08-17 | 贵州劲嘉新型包装材料有限公司 | A kind of offset press realizes the printing process of frosted finish effect |
| CN104476917A (en) * | 2014-12-31 | 2015-04-01 | 陈淼 | Laminating polishing heat energy recovery unit |
| CN108668521A (en) * | 2015-12-15 | 2018-10-16 | 爱克发有限公司 | Use the additivity manufacturing method of the dynamic optical projection for flexographic printing mother matrix |
| CN105882172A (en) * | 2016-05-10 | 2016-08-24 | 深圳市睿同科技有限公司 | Novel flexographic printing method |
| CN106626844A (en) * | 2016-11-22 | 2017-05-10 | 深圳劲嘉集团股份有限公司 | Offset print production process of surface effect treatment of printed material |
| CN107953689A (en) * | 2017-11-21 | 2018-04-24 | 浙江美浓世纪集团有限公司 | A kind of improved method that the online glazing group of offset printing is used for the printing of flexo background color |
| CN109263321A (en) * | 2018-08-21 | 2019-01-25 | 中山市启晨高分子科技有限公司 | Process for curing offset printing depth of field effect by ultraviolet light |
| CN109334289A (en) * | 2018-09-06 | 2019-02-15 | 天津宜药印务有限公司 | Sand dye transfer dataller's process |
| CN110254031A (en) * | 2019-06-14 | 2019-09-20 | 云南侨通包装印刷有限公司昆明分公司 | A kind of frosted finish effect technique of offset lithography |
| CN110335537A (en) * | 2019-08-22 | 2019-10-15 | 郑州市晶森彩印有限公司 | The resin wheel high temperature resistant circular tag that a variety of printing technologies combine |
| CN112319079A (en) * | 2020-09-25 | 2021-02-05 | 广州丽盈塑料有限公司 | Method for flexo printing three-dimensional effect |
| CN112937140A (en) * | 2021-03-31 | 2021-06-11 | 青岛嘉泽包装有限公司 | UV offset printing process for producing cigarette trademark paper by integrating flexo printing and offset printing |
| CN112937140B (en) * | 2021-03-31 | 2022-06-10 | 青岛嘉泽包装有限公司 | UV offset printing process for producing cigarette trademark paper by integrating flexo printing and offset printing |
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Application publication date: 20130403 |