CN102490507A - Method for manufacturing colourless fluorescent ink anti-counterfeiting printing product - Google Patents

Abstract

The invention discloses a method for manufacturing a colourless fluorescent ink anti-counterfeiting printing product. The method comprises the following steps: A. loading a color picture suitable for being printed in a computer; B. opening the picture by using Photoshop software and converting the picture into an RCG mode; C. reversing the picture in the RGB mode; D. creating a file with the size and the resolution the same as those of the image converted by the step A and in the CMYK color mode; E. copying the image information of the file subjected to reversion to an M channel, a Y channel and a C channel of the new file; F. outputting the file of the step E into an M film, a Y film and a C film; G. drying the films into PS formes to be printed; and H. printing the Y forme with green fluorescent ink, printing the M forme with red fluorescent ink, and printing the C forme with blue fluorescent ink. The method has the following beneficial effects: the additive method principle is adopted for printing the printing product, and the colored light principle in the optics is applied in printing, so that a fluorescent image has the color effect with variable continuous tone, and the anti-counterfeiting strength is further improved.

Description

The preparation method of the false proof printing of a kind of colorless fluorescent printing ink

Technical field

The present invention relates to a kind of fluoresent printing ink printing; The preparation method that particularly relates to the false proof printing of a kind of colorless fluorescent printing ink.

Background technology

The printing ink anti-counterfeiting technology is that present printing packaging sector application must more a kind of anti-counterfeiting technology.This kind anti-counterfeiting technology mainly is to be utilized in the conventional oil ink connecting material to add particular matter, processes the technology into special printing-ink through special process.The characteristics of this type anti-counterfeiting technology are: enforcement is simple, cost is low, good concealment, bright in luster, check convenience.Anti-forgery ink mainly contains ultraviolet excited fluorescence anti-forgery ink, magnetic anti-forge printing ink, heat-sensitive variable colour anti-forgery ink, day optical excitation color varying counterfeit-proof ink, optically variable security printing ink, pressure-sensitive anti-forgery ink, Antiforge infrared ink, anti-anti-forgery ink, the anti-counterfeiting stamp ink etc. altered at present.Wherein, the ultraviolet excited fluorescence anti-forgery ink is meant at ultraviolet light (under 200～400nm) irradiations, can send visible light (400～800nm) special ink.The wavelength of pressing excitation source is different, can be divided into short-wave ultraviolet ray excited fluorescence falsification preventing printing-ink (excitation wavelength 254nm) and long wave ultraviolet laser fluorescence anti-counterfeit printing printing ink (excitation wavelength is 365nm) again.Have or not color to be divided into two kinds in coloured fluorescent ink and colorless fluorescent printing ink again according to printing ink.Fluorescent material wherein commonly used is formed classification by it and is mainly contained three kinds.One of which, organic fluorescence materials are the unsaturated molecules with big conjugated body, are mostly a day optical excitation, are used for color and significantly decorate, and fluorescent stability is poor, are prone to oxidation Decomposition; Its two, through the synthetic inorganic fluorescent material of high temperature, be the luminescent material that is used for fluorescent screen, fluorescent tube, it is good to have radioresistance, stability is high, but in oil medium, is difficult to disperse.High, the poor water resistance of synthetic difficulty; Its three, the rare earth organic complex of chemical synthesis is as fluorescent material.It is simple that conventional organic RE fluorescent complex has preparation, in oil medium, is prone to dispersion, dissolving, refinement, colourless under visible light, and ultraviolet excitation is the stronger fluorescent effect of performance down.

Experiment shows that the Antiforge fluorescent ink of adding fluorescent pigment is water-fast, acidproof, alcohol resistance can be good, uses in various packings in a large number at present, and its anti-counterfeiting characteristic is: printed matter can send sparkling fluorescence under visible light and action of ultraviolet radiation.Fluorescent ink is divided into two kinds of hidden anti-fake print ink and tangible anti-forgery inks again.Concealed fluorescent printing ink is false proof: material therefor is a concealed fluorescent printing ink, and typography is simple.This ink printing goes out hidden pattern or literal, under UV-irradiation, demonstrates the phosphor pattern of clear light, and is bright in luster.This anti-counterfeiting detection is convenient, as long as a ultraviolet source or cash inspecting machine are arranged.

Because concealed fluorescent printing ink is that stealth is promptly colourless, naked eyes cannot see the trace labelling that does not also have any machine recognition when printing, and difficulty is bigger so its chromatography is got up, but this kind anti-counterfeiting technology is better disguised, and anti-counterfeiting power is stronger.The high-grade packing of domestic majority all adopts this concealed fluorescent printing ink at present.Particularly existing anti-counterfeit printing all adopts subtractive process; Subtractive process (subtractive process) is by the method yellow, pinkish red, that blue or green three primary colors material (like pigment, printing ink) is lost lustre the mixing principle quality.

The existing shortcoming of existing false proof printing is, the image color of printing is single, as, the false proof sign of the colorless fluorescent on the RMB is single yellow green; Also have some colors abundant a little, also just print out some simple irregular patterns, for example the CocktailPick of all big enterprises etc.

Summary of the invention

Technical problem to be solved by this invention is, provides a kind of false proof intensity high, has the preparation method of the false proof printing of colorless fluorescent printing ink of the coloured image of continuous modulationization.

The technical scheme that the present invention adopted is: the preparation method of the false proof printing of a kind of colorless fluorescent printing ink may further comprise the steps:

The coloured image that A. will be fit to print is written into computer;

B. image is opened with Photoshop software, and converted into the RGB pattern;

C. with the anti-phase of RGB mode image;

D. a newly-built image color mode big or small, that resolution is identical that changes over to steps A is the file of CMYK;

E. two files of opening steps C and step D, with file after the anti-phase, the R of step C, G, B channel image information copy are to M, Y, the C-channel of new files step D;

F. the step e file is output as M, Y, C respectively, 3 film sheets;

G. film sheet is shone into the PS forme and prepare printing;

Y version seal green fluorescence China ink, M version seal red fluorescence China ink, C version seal blue-fluorescence China ink when H. printing.

The invention has the beneficial effects as follows: use additive process principle printing printing, with the coloured light principle in the optics be applied to should brush in the middle of, fluoroscopic image is demonstrated have the color effect of continuous modulationization, false proof intensity further improves simultaneously.

Description of drawings

Fig. 1 is the image file that is written into;

Fig. 2 is the image file after the anti-phase;

Fig. 3 sends a manuscript to the compositor the required image file of film sheet.

The specific embodiment

Below in conjunction with the accompanying drawing and the specific embodiment the present invention is done further explain:

Additive process (additive process) is meant the method that generates new coloured light by the additive color mixing principle of Red Green Blue light.Additive process coloured light mixes back brightness to be increased; When generally having only the color TV of employing or display to represent color; Image format just can be observed the mixing of real desirable additive process color; But the RGB pattern of additive process also is not suitable in the lithographic printing industry, and subtractive process embodies because lithographic printing utilizes CMYK pigment, utilizes the stack of four kinds of printing ink of CMYK and gets.The present invention utilizes the principle of stacking of coloured light according to the additive process in the optics:

Red light+green light+blue light=white light.

Red light+green light=sodium yellow; Red light+blue light=pinkish red coloured light;

Blue light+green light=cyan light.

Take Red Green Blue light and obtain the method for other colors by the different proportion addition.Use the colorless fluorescent printing ink stack of three kinds of colors of red, green, blue, print out colourless pattern, under fluorescent lamp, demonstrate coloury phosphor pattern.

Embodiment 1:

The preparation method of the false proof printing of colorless fluorescent printing ink of the present invention may further comprise the steps:

The coloured image that A. will be fit to print is written into computer, and is as shown in Figure 1;

B. image is opened with Photoshop software, and converted into the RGB pattern, make the high light of image partly adhere to more ink particle, the shadow part of image is then opposite;

C. with the anti-phase of RGB mode image; As shown in Figure 2, for follow-up printing is prepared;

D. a newly-built file with the document image selected for use size, CMYK pattern that resolution is identical; Because the RGB pattern of above-mentioned steps is not a printing mode, therefore need set up the file of a CMYK pattern;

E. two files of opening steps C and step D, with file after the anti-phase, the R of step C, G, B channel image information copy are to M, Y, the C-channel (four chrominance channels can be chosen wantonly) of new files step D; The forme passage that the convenient corresponding printshop of this step needs;

F. the step e file is output as M, Y, 3 film sheets of C respectively; (what adopt at present is with the technological process of image transfer to the forme before the printing) as shown in Figure 3

G. film sheet is shone into the PS forme and prepare printing;

Y version seal green fluorescence China ink, M version seal red fluorescence China ink, C version seal blue-fluorescence China ink when H. printing.What YMC represented is three formes, and green, red, three formes of the black relative YMC of blue-fluorescence configure in advance.

The present invention uses the additive process principle to embody the printing printing; Coloured light principle in the optics is applied in the middle of the printing; Colorless fluorescent printing ink is printed out the coloured image of the continuous modulationization with fluoroscopic image, and this image demonstrates the colored abundant image of continuous modulationization under fluorescent lamp, and this image sight is strong; Because this image is no color image under non-fluorescent lamp; Conventional electronic color scanning can't be discerned, and promptly can't convert the digital former image that computer uses to, makes false proof intensity be able to further raising.

Claims (1)

1. the preparation method of the false proof printing of colorless fluorescent printing ink is characterized in that, may further comprise the steps:

The coloured image that A. will be fit to print is written into computer;

B. image is opened with Photoshop software, and converted into the RGB pattern;

C. with the anti-phase of RGB mode image;

D. a newly-built image color mode big or small, that resolution is identical that changes over to steps A is the file of CMYK;

E. two files of opening steps C and step D, with file after the anti-phase, the R of step C, G, B channel image information copy are to M, Y, the C-channel of new files step D;

F. the step e file is output as M, Y, C respectively, 3 film sheets;

G. film sheet is shone into the PS forme and prepare printing;

Y version seal green fluorescence China ink, M version seal red fluorescence China ink, C version seal blue-fluorescence China ink when H. printing.

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