CN101954804B - Frequency conversion screening anti-counterfeiting printing process - Google Patents

Abstract

The invention relates to a printing process, in particular to a frequency conversion screening anti-counterfeiting printing process. The process establishes a method for implementing the frequency conversion screening anti-counterfeiting printing through a digital frequency conversion screening technology, implements a new combination of embedded anti-counterfeiting textures and printing patterns and unique simply-identified textures by using a frequency conversion screening anti-counterfeiting database and combining the traditional digital production process and heat sensitive CTP, forms a high-reliability printing production process and an non-substitutable anti-counterfeiting identification technology, improves the capability of printing products with high-grade and high anti-counterfeiting requirements by printing companies, increases the sustainable capability and the innovation capability of the printing companies, overcomes the vital deficiency of numerous moire anti-counterfeiting technologies at present, optimizes the availability of the anti-counterfeiting technology cost, the identification uniqueness, the non-substitutability and anti-counterfeiting effectiveness and simplifies the printing production application and the technical process thereof.

Description

Frequency conversion screening anti-counterfeiting printing process

Technical field

The present invention relates to a kind of typography, be specially a kind of frequency conversion screening anti-counterfeiting printing process.

Background technology

Adopting the anti-counterfeiting technology based on print reproduction in the packing of product in modern times, particularly expensive goods packing is to guarantee that product not by the important technical of infringement and personation, also is the key technology that each printing enterprise captures and opens up a market.At present, anti-counterfeiting technology commonly used has laser hologram, anti-forgery ink, anti-forge paper, watermark, magnetic card, two-dimensional bar code etc. in the printing industry field.But in the realization of anti-counterfeiting technology leading indicators such as cost availability, identification uniqueness, irreplaceability, false proof actual effect, all there is defective separately.In numerous anti-counterfeiting technologies, printing technology is false proof to be the practicability anti-counterfeiting technology that a kind of cost is lower than other anti-counterfeiting technology, also is the necessary carrier that various anti-counterfeiting technologies are adhered to.Therefore, to carry out false proof be one of the key technology of each print product buyer and printing enterprise research and development to Application Research printing technology technology always.

In false proof research and development based on printing technology; Beginning domestic and international research institution from the 1980's all will utilize image texture variation and texture particularity to make up the antiforge technology as important research direction and technological break-through point under the prerequisite that does not increase any cost.Wherein to utilize the stack of same frequency signal space to form the mechanism of interference fringe; Utilize the associated change of colored printing CMYK four-color separation screen angle to cause the interference fringe of angle difference, it is false proof the most ripe and popular to make that printed matter surface after the printing produces the moire of textured pattern of special interference fringe.But this moire anti-counterfeiting technology exists the interference fringe that is produced can change the final effect of original copy; The fatal shortcoming of destroying the pattern aesthetic feeling and can't letting the print product buyer accepted; And very high to printing equipment, technology and material requirements, changing slightly will cause interfering the difference of texture and cause scrapping.Therefore, printing enterprise and research and development institution thereof be all in the technology of this fatal shortcoming of seeking breakthrough, the exclusive antifalse technology of research is captured printing market and technological highland as enterprise core competitiveness key element.

Summary of the invention

To the problem that exists in the prior art, the object of the present invention is to provide a kind of technical scheme of frequency conversion screening anti-counterfeiting printing process.

Described frequency conversion screening anti-counterfeiting printing process is characterized in that may further comprise the steps:

1) designs false proof special texture; According to consumer products characteristic and false proof requirement; Select general image treatment software Adobe Photoshop CS of printing industry institute and Adobe Illustator CS for use; In software, design the data texturing sample that satisfies various different product feature requirement and relevant with it masking-out file in advance, and these special texture are stored in supply the user to select in the false-proof texture database or reference during design;

2) false-proof texture data base administration; Foundation is unique retrieval foundation with bar code; With the pattern intelligent comparison is false-proof texture preservation, extraction and the recognition methods of characteristic, guarantees that the false-proof texture that is provided can satisfy the requirement of follow-up typography and the requirement of product printable fabric fully;

3) false proof data and actual image, text and data merge; On general digital production flowsheet platform; Adopt general RIP to form false-proof texture 1bite Tiff screening data and actual picture and text 1bite Tiff screening data; And carry out the data fusion and the compound output of frequency conversion screening data according to false proof designing requirement designed special algorithm, generate the false proof data flow of frequency conversion screening;

4) piece together big version and embed false proof data; With the screening data file of false-proof texture as embedded type file and other printing object layout; And after false proof screening data file and other print contents carried out data fusion; Employing adds network parameters normally and carries out screening output CTP forme, the i.e. false proof screening texture of frequency conversion behind the frequency conversion screening;

5) RIP output control and thermosensitive CTP output are at first set RIP parameter and greyscale transformation table according to frequency conversion screening data characteristic, thereby guarantee that the output data can be adaptive with temperature-sensitive sheet material characteristic; Next is on selected general thermosensitive type CTP output machine and general temperature-sensitive sheet material, utilizes the positioning reference of CTP output machine to come on forme accurately positioning control output data to form exclusive frequency conversion and adds web frame; The 3rd is the process control parameters of setting up digitized thermosensitive CTP forme output, and the control parameter comprises solution level, soup compensation rate, flushing temperature, washing time and soup electrical conductivity and pH value, guarantees that the output result has the repeatability of height; With the forme of obtain to be embedded with frequency conversion screening information, use general CMYK press printing, obtain final special false-proof texture.

Described frequency conversion screening anti-counterfeiting printing process is characterized in that the false proof special texture described in the step 1) is a kind of half tone image with specific screen frequency, screen angle and dot shape.

Described frequency conversion screening anti-counterfeiting printing process; The step that it is characterized in that the false proof data flow formation of the frequency conversion screening described in the step 3) is following: according to printing condition, the image processing software parameter is set, design and selection false-proof texture view data; Design special frequency conversion screening masking-out; Masking-out data and view data merge, and RIP output control parameter are set, the false proof data file of output 1bite Tiff frequency conversion.

Described frequency conversion screening anti-counterfeiting printing process; It is characterized in that the thermosensitive CTP forme output control flow described in the described step 5) is following: thermosensitive CTP output control parameter is set; Screening CTP forme positioning reference parameter; Select thermosensitive CTP forme flushing control parameter, false proof data of frequency conversion and picture and text output data fusion, forme exposure control and the inspection of output forme.

Above-mentioned frequency conversion screening anti-counterfeiting printing process; Utilize the frequency conversion Digital screening technology; Set up the method for the false proof realization of printing frequency conversion screening, and the false proof database of utilization frequency conversion screening, in conjunction with present digital production flow process and thermosensitive CTP; The fusion of brand-new embedded false-proof texture and printing figure message and the unique texture that can simply discern have been realized; Form print production technology and the irreplaceable anti-counterfeiting mark technology of high reliability, improved printing enterprise's high-end, high false proof ability that requires product of undertaking the printing of, strengthened printing enterprise's sustainable development and innovation ability; Solve the fatal deficiency of present numerous moire anti-counterfeiting technologies, reached anti-counterfeiting technology cost availability, identification uniqueness, irreplaceability, the optimization of false proof actual effect and the simplification of print production application and technical matters thereof.

Description of drawings

Fig. 1 is a flow chart of the present invention;

The flow chart that Fig. 2 forms for the false proof data flow of frequency conversion screening of the present invention;

Fig. 3 is thermosensitive CTP forme output control flow chart of the present invention.

The specific embodiment

Below in conjunction with Figure of description the present invention is further specified:

As shown in the figure, frequency conversion screening anti-counterfeiting printing process may further comprise the steps:

1) designs false proof special texture; According to consumer products characteristic and false proof requirement; Select general image treatment software Adobe Photoshop CS of printing industry institute and Adobe Illustator CS for use; In software, design the data texturing sample that satisfies various different product feature requirement and relevant with it masking-out file in advance, and these special texture are stored in supply the user to select in the false-proof texture database or reference during design;

2) false-proof texture data base administration; Foundation is unique retrieval foundation with bar code; With the pattern intelligent comparison is false-proof texture preservation, extraction and the recognition methods of characteristic, guarantees that the false-proof texture that is provided can satisfy the requirement of follow-up typography and the requirement of product printable fabric fully;

3) false proof data and actual image, text and data merge; On general digital production flowsheet platform; Adopt general RIP to form false-proof texture 1bite Tiff screening data and actual picture and text 1bite Tiff screening data; And carry out the data fusion and the compound output of frequency conversion screening data according to false proof designing requirement designed special algorithm, generate the false proof data flow of frequency conversion screening;

4) piece together big version and embed false proof data; With the screening data file of false-proof texture as embedded type file and other printing object layout; And after false proof screening data file and other print contents carried out data fusion; Employing adds network parameters normally and carries out screening output CTP forme, the i.e. false proof screening texture of frequency conversion behind the frequency conversion screening;

5) RIP output control and thermosensitive CTP output are at first set RIP parameter and greyscale transformation table according to frequency conversion screening data characteristic, thereby guarantee that the output data can be adaptive with temperature-sensitive sheet material characteristic; Next is on selected general thermosensitive type CTP output machine and general temperature-sensitive sheet material, utilizes the positioning reference of CTP output machine to come on forme accurately positioning control output data to form exclusive frequency conversion and adds web frame; The 3rd is the process control parameters of setting up digitized thermosensitive CTP forme output, and the control parameter comprises solution level, soup compensation rate, flushing temperature, washing time and soup electrical conductivity and pH value, guarantees that the output result has the repeatability of height; With the forme of obtain to be embedded with frequency conversion screening information, use general CMYK press printing, obtain final special false-proof texture.

False proof special texture described in the step 1) is a kind of half tone image with specific screen frequency, screen angle and dot shape.

The step that the false proof data flow of frequency conversion screening described in the step 3) forms is following: according to printing condition; The image processing software parameter is set; Design and selection false-proof texture view data, design special frequency conversion screening masking-out, masking-out data and view data merge; RIP output control parameter is set, the false proof data file of output 1bite Tiff frequency conversion.

Thermosensitive CTP forme output control flow described in the step 5) is following: thermosensitive CTP output control parameter is set; Screening CTP forme positioning reference parameter; Select thermosensitive CTP forme flushing control parameter, false proof data of frequency conversion and picture and text output data fusion, forme exposure control and the inspection of output forme.

The present invention is in the core results to domestic and international moire anti-counterfeiting technology---on the basis that the uniqueness texture is researched and analysed; Proposed to solving the many deficiencies of moire that a brand-new anti-counterfeiting technology---the frequency conversion screening is false proof, the digital production flow process of practicability is technological with thermosensitive CTP on implementation, to have adopted present global printing industry.

The present invention has adopted the mechanism that is different from the moire anti-counterfeiting technology fully, and having eliminated moire fully false proof is the ugly texture that interference caused between two or more color separation films, forms the special texture structure that screening combines with the temperature-sensitive photosensitive mechanism.The formation that this frequency conversion adds web frame can either form through twice stack of monochromatic color separation data computing; Also can be formed by stacking through different color separation data; The result that obtains had not both had the false proof tedious texture of moire, had the special pattern of frequency conversion screening again, organically combined with rear end output control through front end data is false proof simultaneously; Make other enterprise or user be difficult to crack this technology or copy to have possessed good security feature.Result of study shows; 50% circular shaped lattice point is adopted the output result after the data fusion that the frequency conversion screening carried out; On the halftone dot image of being exported; Original circular shaped lattice point rule changes, and dot shape and distribution characteristics thereof have produced many special dot shapes and distribution characteristics, and this dot shape can't be made through existing scanning means, screening means and design software.

The present invention adopts the comprehensive technology path of software and hardware combining, digitized process control and adaptive printing condition, can guarantee the accurate realization of false proof strategy of user and demand.

On the false proof special texture of design; Selected software is general image treatment software Adobe Photoshop CS of printing industry institute and Adobe Illustator CS; In these softwares, design the data texturing sample that satisfies various different product feature requirement and relevant with it special masking-out in advance, and these special texture are stored in supply the user to select in the false-proof texture database or reference during design.Simultaneously, prevent that also same texture from misapplying in different anti-fake products, promote the exclusive property and the value of frequency conversion screening false-proof texture.

On the false-proof texture database management technology; Foundation is unique retrieval foundation with bar code; With the pattern intelligent comparison is false-proof texture preservation, extraction and the recognition methods of characteristic, can guarantee that the false-proof texture that is provided can satisfy the requirement of follow-up typography and the requirement of product printable fabric fully.

In false proof data and the fusion of actual image, text and data; At first be at present general digital production flowsheet platform; Adopt general RIP to form false-proof texture 1bite Tiff screening data and actual picture and text 1bite Tiff screening data; And carry out the data fusion and the compound output of frequency conversion screening data according to false proof designing requirement designed special algorithm, generate the false proof data flow of frequency conversion screening.

In the false proof data flow forming process of this frequency conversion screening; The printing control parameter (comprising maximum field density, dot gain, maximum double exposure rate and grey balance) that need come correctly to be provided with image processing software according to the material and the printing condition of institute's printed product; Set the branch colour standard and add network parameters (screening frequency, screen angle and dot shape); Also need set up special-purpose masking-out, to guarantee the accurate positioning in embedded zone for the integration region of frequency conversion screening data.

In RIP output control and thermosensitive CTP output, at first need set RIP parameter and greyscale transformation table, thereby guarantee that the output data can be adaptive with temperature-sensitive sheet material characteristic according to frequency conversion screening data characteristic.Next is on selected general thermosensitive type CTP output machine and general temperature-sensitive sheet material, utilizes the positioning reference of CTP output machine to come on forme accurately positioning control output data to form exclusive frequency conversion and adds web frame.It three is process control parameters of setting up the output of digitized thermosensitive CTP forme, and the control parameter comprises solution level, soup compensation rate, flushing temperature, washing time and soup electrical conductivity and pH value.Thereby guarantee that the output result has the repeatability of height, and reduce dependence operating personnel's professional skill.

The present invention has adopted image software to handle the work flow of formation screening data, flow process group version embedding frequency conversion screening information, RIP output fusion anti-counterfeiting information, thermosensitive CTP output formation anti-counterfeit structure; Data passes with related on very tight; Not only can prevent effectively that know-how from leaking, guarantee that also critical technical parameter is in the high reliability state.Even the actual job personnel understand whole flow processs, there is not the yet extremely difficult system of specific training to grasp the core of frequency conversion screening anti-counterfeiting technology.The control model formation that this software and hardware combines and the design of screening pattern texture make the information of institute's encryption section have very intuitively, be prone to the characteristic of identification and exclusive property, thereby have effectively promoted the level of anti-counterfeiting technology, have expanded adaptable scope.

On implementation method, the implementation method that has adopted advanced hardware to merge for the soft or hard of innovating for basis, software.Wherein, selected the thermosensitive CTP technology of present advanced technology at hardware aspect.The equipment of this technology not only all adopts digitlization to control, and the reliability of institute's output forme is high, and can locate through high precision and carry out the diversity output that multiexposure, multiple exposure is realized frequency conversion screening data.And in the software innovation aspect, the color separation, screening function and the digital masking-out that make full use of under the setting of software numeral are carried out the fusion of frequency conversion multi-frequency screening data, accomplish the formation of special false-proof texture.The detailed process of implementation method is following:

(1) according to consumer products characteristic and false proof requirement, design or selection false-proof texture file.The false-proof texture of this particular design; Be actually a kind of half tone image with specific screen frequency, screen angle and dot shape; And then the requirement hiding according to enciphered data; Adopt software to make the masking-out file that need not the false proof screening facsimile file of frequency conversion, select the color code and the cipher mode thereof of anti-false colour version;

(2) according to setting printing condition RIP control method; And adopt RIP software that the color separation file of selected look version is carried out screening; Such as pinkish red version 175LPI, 15 ° of screen angles, dot shape are circular; Pay particular attention to be this color separation version to add network parameters different with the printing screening parameter of the pinkish red version of other picture and text part, finally generate the 1-bit tiff file of different frequency;

(3) in the digitlization flow process; Utilize digital printing production procedure software; With the screening data file of false-proof texture as embedded type file and other printing object layout; And after false proof screening data file and other print contents carried out data fusion, adopt to add network parameters (pinkish red screen angle is 45 °) normally and carry out screening output CTP forme, the i.e. result of the false proof screening texture of frequency conversion behind the variable ratio frequency changer screening.This false-proof texture that has merged frequency conversion screening data all has high randomness and complexity on the texture structure and the regularity of distribution, very big with scanning and artificial imitation difficulty, cost is high.

(4) with the forme of obtain to be embedded with frequency conversion screening information, use general CMYK press printing, just can obtain final special false-proof texture.The reliability of the false-proof texture that actual print repeats to export is more than 99.99%.

The equipment that the present invention adopted, software and material are the products of present printing industry main flow, and the application restriction is very low, but on false proof design, data and syncretizing mechanism, has technical advantage and the uniqueness that existing anti-counterfeiting technology needs to be resolved hurrily, and mainly shows:

(1) towards the data fusion of software and hardware, not only can give full play to the repeatedly advantage of positioning exposure of hardware high accuracy, can on software, carry out the frequency conversion data again and once export and the repeatedly variation of output, improve imitated difficulty;

(2) masking-out of employing software made can be eliminated the hardware mechanical precision, repeatedly export the difference of exporting behind repeatability or the long-time interval, eliminates the dependence of output result to equipment, forms real uniqueness advantage;

(3) owing to control the result that the frequency conversion screening is realized based on software; Can carry out multiple innovation in data fusion; And given play to the different uniqueness characteristic of output characteristics of different hardware (different brands, different machines); Utilize the output characteristics of equipment just can produce the effect that others can't copy fully, make the frequency conversion screening anti-counterfeiting technology that is proposed have very strong uniqueness equipment.

Claims (4)

1. frequency conversion screening anti-counterfeiting printing process is characterized in that may further comprise the steps:

1) designs false proof special texture; According to consumer products characteristic and false proof requirement; Select general image treatment software Adobe Photoshop CS of printing industry institute and Adobe Illustator CS for use; In software, design the data texturing sample that satisfies various different product feature requirement and relevant with it masking-out file in advance, and these special texture are stored in supply the user to select in the false-proof texture database or reference during design;

2) false-proof texture data base administration; Foundation is unique retrieval foundation with bar code; With the pattern intelligent comparison is false-proof texture preservation, extraction and the recognition methods of characteristic, guarantees that the false-proof texture that is provided can satisfy the requirement of follow-up typography and the requirement of product printable fabric fully;

3) false proof data and actual image, text and data merge; On general digital production flowsheet platform; Adopt general RIP to form false-proof texture 1bite Tiff screening data and actual picture and text 1bite Tiff screening data; And carry out the data fusion and the compound output of frequency conversion screening data according to false proof designing requirement designed special algorithm, generate the false proof data flow of frequency conversion screening;

4) piece together big version and embed false proof data; With the screening data file of false-proof texture as embedded type file and other printing object layout; And after the screening data file of false-proof texture and other print contents carried out data fusion; Employing adds network parameters normally and carries out screening output CTP forme, the i.e. false proof screening texture of frequency conversion behind the frequency conversion screening;

5) RIP output control and thermosensitive CTP output are at first set RIP parameter and greyscale transformation table according to frequency conversion screening data characteristic, thereby guarantee that the output data can be adaptive with temperature-sensitive sheet material characteristic; Next is on selected general thermosensitive type CTP output machine and general temperature-sensitive sheet material, utilizes the positioning reference of CTP output machine to come on forme accurately positioning control output data to form exclusive frequency conversion and adds web frame; The 3rd is the process control parameters of setting up digitized thermosensitive CTP forme output, and the control parameter comprises solution level, soup compensation rate, flushing temperature, washing time and soup electrical conductivity and pH value, guarantees that the output result has the repeatability of height; With the forme of obtain to be embedded with frequency conversion screening information, use general CMYK press printing, obtain final special false-proof texture.

2. frequency conversion screening anti-counterfeiting printing process according to claim 1 is characterized in that the false proof special texture described in the step 1) is a kind of half tone image with specific screen frequency, screen angle and dot shape.

3. frequency conversion screening anti-counterfeiting printing process according to claim 1; The step that it is characterized in that the false proof data flow formation of the frequency conversion screening described in the step 3) is following: according to printing condition, the image processing software parameter is set, design and selection false-proof texture view data; Design special frequency conversion screening masking-out; Masking-out data and view data merge, and RIP output control parameter are set, the false proof data file of output 1bite Tiff frequency conversion.

4. frequency conversion screening anti-counterfeiting printing process according to claim 1; It is characterized in that the thermosensitive CTP forme output control flow described in the described step 5) is following: thermosensitive CTP output control parameter is set; Screening CTP forme positioning reference parameter; Select thermosensitive CTP forme flushing control parameter, false proof data of frequency conversion and picture and text output data fusion, forme exposure control and the inspection of output forme.

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