CN102568020A - Overprint plate making method - Google Patents
Overprint plate making method Download PDFInfo
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- CN102568020A CN102568020A CN2012100070999A CN201210007099A CN102568020A CN 102568020 A CN102568020 A CN 102568020A CN 2012100070999 A CN2012100070999 A CN 2012100070999A CN 201210007099 A CN201210007099 A CN 201210007099A CN 102568020 A CN102568020 A CN 102568020A
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Abstract
The invention discloses an overprint plate making method, which is characterized by comprising the following steps of: (1) laying out a page; (2) performing color separation; (3) trapping an image; (4) rasterizing the image; and (5) making up. During the trapping of the image in the step (3), the number of lattice point layers of a dark color image and a light color image to be overprinted is changed, and then overprint is performed at an overprint region of the light color image to an overprint region of the dark color image, so that the tone of an overprint image is obviously reduced, the contrast with the dark color image and the light color image before overprint is relieved, the defects of overlaying mark of two-color overprint and accuracy error of a printing machine are overcome, and according to the technical improvement, not only is the product quality guaranteed, but also good economic benefit stands out, the plate printing and printing frequency are saved, and the product quality and the yield are improved.
Description
Technical field
The present invention relates to a kind of printing process, relate in particular to a kind of double exposure method for platemaking.
Background technology
The printing of high-grade packing box generally is on the basis of C, M, Y, K four-color process, to add spot color printing; Very accurate to the cover alignment request between the forme of all kinds in printing process; Because the register trouble meeting causes appearing of printable fabric background color between two negatives; Visually can produce the 3rd look double line of a tiny white line (promptly leaking white) or a dichromatism double exposure, these flaws can have a strong impact on the outward appearance of printing.But in actual production process; Because the factors that Act for God such as mechanical system errors and printable fabric distortion; Possibly not realize the absolute alignment between the forme; In order to address this problem, pictures different process software and manufacturer of software for composing have all proposed some solutions, basically all are to come design software according to the principle that falls into seal or double exposure.Fall into the seal principle: be to expand down that look does not expand colouring generally speaking, expand light color and do not expand dark color, expand plain net in addition and do not expand the meaning on the spot.Sometimes also can expand mutually, special circumstances are next will carry out reverse trap, even also will between two adjacent looks, add the space and remedy overprint error, so that printed matter is attractive in appearance.Falling into the size of seal amount will decide according to the characteristic of printable fabric and the chromatography precision of print system.The sunken seal amount of general offset printing is smaller, and it is big that the sunken seal amount of gravure and flexo is wanted, and generally at 0.2-0.3mm, it is fixed to require to printing precision according to the client.The method that falls into seal mainly contains: (1) monochromatic line fall-on style: on the color lump limit, add light lines, and elect the lines attribute as double exposure.(2) synthetic collimation method: on the color lump limit, add synthetic thread. the lines attribute is not elected double exposure as.(3) top and bottom process: on different layers, realize falling into seal through contracting or extend out in to element.(4) displacement method: contract in realizing through the position of moving flex point in the color lump or extend out, generally be used in the sunken India and China relevant with gradual change.Existing each image processing software mainly solves this problem through top and bottom process and displacement method; But some problems also can occur after these image processing softwares fall into and print and to satisfy the high-quality requirement of printing; As: 1) Adobe Photoshop mainly is a sunken seal of accomplishing image through trap width that CMYK pattern hypograph is set; The width that falls into seal only is set; Image just can only fall into seal through enlarging color, and disconnected article and sawtooth appearred in the outline line border when this will cause color lump and color lump to fall into seal, influenced the quality of printing.2) Adobe Illustrator software mainly is through the width of area of trap is set; The ratio value of the sunken seal of vertical trap and level and light tone reduction ratio etc.; With respect to Photoshop; Its trapping effect has been got well a lot, but its deficiency then is can not implement automatic trapping between the pattern to filling pattern and stroke, gradual change, continuous toned image and other characteristic.3) connect the higher CorelDraw of domestic packages printing factory's utilization rate and can not realize continuous toned image and the automatic trapping that imports image.The mode that above-mentioned each image processing software also just merges through simple figure layer or light tone reduces, not basic solution superimposed images and the deep mixed problem that causes of original image.The packing of specialty fall into seal software as: the Deskpack of PackEdge, Artpro, Esko-Graphics company, upright Packsharp, the QM DI46-4 of Heidelberg and the Trapwise of Ke Liao issue etc. need independently software systems to use; This just requires the user must buy software simultaneously and sunken impression block just can be used sunken impression block wherein; This has increased user's financial burden undoubtedly greatly, for publishing work personnel before printing are provided with threshold one.Originally increasing lose lustre double exposure method for platemaking and printer's artistic skill of net remedies error that register trouble brings preferably, improves the printing printing quality and the percentage of A-class goods.
Summary of the invention
The technical matters that the present invention will solve provides a kind of double exposure method for platemaking, the mass defect that this double exposure method for platemaking can avoid register trouble to bring, the quality and the qualification rate of raising product.The technical scheme that adopts is following:
A kind of double exposure method for platemaking is characterized in that comprising the steps:
(1) page layout: import the figure that designs, image and literal in the software for composing, layout becomes the single page;
This step is mainly accomplished the editor and the relation between graph image and the literal of the inserting of graph image, literal and is handled.Compare with general printed matter; The printing quality of cigarette-brand requires much higher, must realize that two standards of image and literal just can reach client's satisfaction, therefore preferably adopts the Freehand software for composing to set type; The Freehand software for composing compares with CorelDRAW with other two Illustrator of main flow software for composing; FreeHand has bigger advantage in the cigarette-brand printing: volume is little, and travelling speed is faster, satisfies the big demand of cigarette-brand composing workload; The word processing function can match in excellence or beauty with professional word processor, satisfies what designer's of printing work requirement; Be a real vector software, especially to accurate adjustment figure, the free originality graphing capability is powerful, is widely used.
(2) color separation: the page after the layout carries out the coloured image color separation in color separation software, confirms to duplicate contrast scope and grey balance curve, adjustment level curve and correction of color, confirms black print, removes background color and under color addition;
(3) the sunken seal of image: at first, confirm the double exposure position, dark-colored image that needs double exposure and light-colored image are placed on respectively in two figure layers that light-colored image is in the upper strata of dark-colored image and the regional overlaid that both need double exposure; Secondly, reduce the site number of plies in the double exposure zone of dark-colored image, increase the site number of plies in the double exposure zone of light-colored image simultaneously; At last, double exposure is carried out to the double exposure zone of dark-colored image in the double exposure zone of light-colored image;
In this step; For obtaining double exposure effect preferably; Double exposure is carried out to the double exposure zone of dark-colored image in the double exposure zone of above-mentioned light-colored image, needs through repetition test repeatedly, and promptly be the size in adjustment double exposure zone; And the change value of the site number of plies of adjustment dark-colored image and light-colored image, until reaching best double exposure effect.
(4) image raster processing: the fm screening mode that adopts square site color separation after literal, figure and image raster generation halftone dot image on the page; And control imaging system record page info on the plate, by the printing chromatic number export the color separation forme respectively;
Preferred RIP (raster image processor) comes processing page in this step; The RIP mode of piecing together big version again; Can simplify the alter mode of final act,, only need after having revised mistake once the processing of this page RIP again if find that in the end the page has typo during outgoing inspection; Replace the inherited error part and get final product, than whole big version RIP is again saved trouble.This kind RIP processing mode relatively is suitable for packing, labels class printing.
(5) layout: import the single file of PS that accomplishes composing or PDF in the layout software, on per 4～28 unit file group to versions, and on every version, generate version mark, cross curve, forme control strip and asterisk etc. automatically.
In this step, the Preps layout software of preferred former Ke Liao (Creo) company.Preps software engineering content is high, and compatible performance is strong, can be fit to the printing demand of different class.Preps layout software has following advantage: the page that can use RIP to cross is directly pieced together big version, is suitable for the big version operation of assembly of packed file; Can allow the user to use different files type, page size and direction with, and cut mark and the cross curve that carry out the various pages respectively set, can also on a platform paper, put into different printed documents simultaneously; Support the pdf document layout fully, and support built-in RIP to fall into the official seal breath, improve the integration of JDF simultaneously; Ke Liao provides the commodity production flow process of a whole set of Chinese version, can prompt workflow to the seal of exporting control from Preps layout software.
Sunken being imprinted in the actual production process of above-mentioned steps (2) color separation and step (3) image, the branch of strict priority not, preferably color separation was carried out before the sunken seal of image.
As preferred version of the present invention, it is characterized in that: in the said step (2), the minimizing amplitude of the site number of plies in the double exposure of dark-colored image zone is 0～15%.
As preferred version of the present invention, it is characterized in that: in the said step (2), the increasing degree of the site number of plies in the double exposure of light-colored image zone is 0～10%.
Need the dark-colored image of double exposure, the site number of plies of light-colored image through change, and then carry out double exposure, significantly weakened the depth of shade of double exposure image; Alleviated with double exposure before the contrast of dark-colored image, light-colored image; Overcome the defective that laminates trace and printing machine trueness error of two look chromatographys, its technological improvement not only is protected on product quality, has more given prominence to good economic benefit; Save forme, print pass, improved product quality and yield rate.
Description of drawings
Accompanying drawing is the process flow diagram of the preferred embodiment for the present invention.
Embodiment
Do further explanation below in conjunction with accompanying drawing and preferred implementation of the present invention.
Shown in accompanying drawing, this double exposure method for platemaking comprises the steps:
Step (1) page layout: in the FreeHand software for composing, accomplish inserting and the editor of literal such as Smoking is harmful to your health of bar code figure, image, form the single page;
Step (2) color separation: in color separation software, accomplishing the color separation of image, is respectively eight process colors such as white, black, cyan, magenta, yellow, special background color, dark-brown and light brown;
The sunken seal of step (3) image: dark-brown and light brown are increased the sunken seal processing that net is lost lustre; The light brown image is placed on the figure layer above the dark-brown image; The double exposure of light brown image and dark-brown image is of a size of 0.15mm, and the site number of plies in the double exposure zone of dark-brown image reduces 12%, and the site number of plies in the double exposure of light brown image zone increases by 8%; Double exposure is carried out to the double exposure zone of dark-brown image in double exposure zone by the light brown image, and the trapping effect of this moment is best;
Step (4) image raster processing: employing be square fm screening mode, obtain eight look halftone dot images respectively, carrying out layout subsequently;
Step (5) layout: piece together 15 single page files in a space of a whole page that is fit to print.
In other embodiment of the present invention, in the step (3), the site number of plies in dark-brown double exposure zone does not reduce, and the site number of plies in the double exposure zone of light brown does not increase.
In other embodiment of the present invention, in the step (3), the site number of plies in dark-brown double exposure zone reduces 15%, and the site number of plies in the double exposure zone of light brown increases by 10%.
Claims (3)
1. a double exposure method for platemaking is characterized in that comprising the steps:
(1) page layout: import the figure that designs, image and literal in the software for composing, layout becomes the single page;
(2) color separation: the page that will fall into after seal is handled carries out the coloured image color separation in color separation software, confirms to duplicate contrast scope and grey balance curve, adjustment level curve and correction of color, confirms black print, removes background color and under color addition;
(3) the sunken seal of image: at first, confirm the double exposure position, dark-colored image that needs double exposure and light-colored image are placed on respectively in two figure layers that light-colored image is in the upper strata of dark-colored image and the regional overlaid that both need double exposure; Secondly, reduce the site number of plies in the double exposure zone of dark-colored image, increase the site number of plies in the double exposure zone of light-colored image simultaneously; At last, double exposure is carried out to the double exposure zone of dark-colored image in the double exposure zone of light-colored image;
(4) image raster processing: the fm screening mode that adopts square site color separation after literal, figure and image raster generation halftone dot image on the page; And control imaging system record page info on the plate, by the printing chromatic number export the color separation forme respectively;
(5) layout: import the single file of PS that accomplishes composing or PDF in the layout software, on per 4～28 unit file group to versions, and on every version, generate version mark, cross curve, forme control strip and asterisk etc. automatically.
2. double exposure method for platemaking as claimed in claim 1 is characterized in that: in the said step (3), the minimizing amplitude of the site number of plies in the double exposure of dark-colored image zone is 0～15%.
3. double exposure method for platemaking as claimed in claim 1 is characterized in that: in the said step (3), the increasing degree of the site number of plies in the double exposure of light-colored image zone is 0～10%.
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| CN201210007099.9A CN102568020B (en) | 2012-01-11 | 2012-01-11 | Overprint plate making method |
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| CN201210007099.9A CN102568020B (en) | 2012-01-11 | 2012-01-11 | Overprint plate making method |
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| CN102568020A true CN102568020A (en) | 2012-07-11 |
| CN102568020B CN102568020B (en) | 2014-02-19 |
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Cited By (10)
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| CN103909752A (en) * | 2013-11-15 | 2014-07-09 | 浙江汇诚通用印务有限公司 | Red date milk presentation box printing technology |
| CN106739592A (en) * | 2016-11-21 | 2017-05-31 | 武汉宝钢印铁有限公司 | A kind of metal UV color printing product color separation prints coating method |
| CN107832024A (en) * | 2017-11-09 | 2018-03-23 | 山形印刷(无锡)有限公司 | A kind of printing process for preventing printed data mistake and print system |
| CN108621590A (en) * | 2017-03-21 | 2018-10-09 | 海德堡印刷机械股份公司 | The method of black structures for keeping object |
| CN108725005A (en) * | 2018-05-25 | 2018-11-02 | 溧阳市鑫宇印刷有限公司 | A kind of anti-copy extraordinary method for platemaking |
| CN111391474A (en) * | 2020-02-26 | 2020-07-10 | 清远市简一陶瓷有限公司 | Silk screen suitable for all layouts in marble tile and manufacturing method thereof |
| CN111890781A (en) * | 2020-08-26 | 2020-11-06 | 苏州创亚材料科技有限公司 | Printing plate manufacturing process |
| CN113172986A (en) * | 2021-03-26 | 2021-07-27 | 阿里巴巴（中国）有限公司 | Network layout generation method, production system, image processing method and device |
| CN114502377A (en) * | 2019-10-10 | 2022-05-13 | 东洋制罐株式会社 | Plate making method, plate making system and can body |
| CN115556492A (en) * | 2022-10-09 | 2023-01-03 | 陕西金叶印务有限公司 | Process method for improving offset printing |
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| CN108621590A (en) * | 2017-03-21 | 2018-10-09 | 海德堡印刷机械股份公司 | The method of black structures for keeping object |
| CN107832024A (en) * | 2017-11-09 | 2018-03-23 | 山形印刷(无锡)有限公司 | A kind of printing process for preventing printed data mistake and print system |
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| CN114502377A (en) * | 2019-10-10 | 2022-05-13 | 东洋制罐株式会社 | Plate making method, plate making system and can body |
| CN111391474A (en) * | 2020-02-26 | 2020-07-10 | 清远市简一陶瓷有限公司 | Silk screen suitable for all layouts in marble tile and manufacturing method thereof |
| CN111890781A (en) * | 2020-08-26 | 2020-11-06 | 苏州创亚材料科技有限公司 | Printing plate manufacturing process |
| CN113172986A (en) * | 2021-03-26 | 2021-07-27 | 阿里巴巴（中国）有限公司 | Network layout generation method, production system, image processing method and device |
| CN115556492A (en) * | 2022-10-09 | 2023-01-03 | 陕西金叶印务有限公司 | Process method for improving offset printing |
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