阅读说明：本技术 一种点读印刷品的印刷工艺 (Printing process for point-reading printed matter ) 是由 皮传哲 于 2020-07-30 设计创作，主要内容包括：本发明涉及印刷工艺领域,具体公开了一种点读印刷品的印刷工艺,包括以下步骤：步骤一,调整印刷版的出版精度；步骤二,使用不含碳的专灰油墨作为印刷机的第一组颜色进行印刷；步骤三,使用品红油墨、青色油墨及黄色油墨依次进行第二组、第三组和第四组颜色的印刷；步骤四,使用二维码码点印刷版作为印刷机的第五组印版,并使用含碳的黑色油墨进行印刷。本发明具有保证隐形码清晰完整,保证点读效果,优化识别和读取点读内容优点。(The invention relates to the field of printing processes, and particularly discloses a printing process for reading printed matters, which comprises the following steps: step one, adjusting the publishing precision of a printing plate; step two, printing by using carbon-free special gray ink as a first group of colors of the printer; printing a second group, a third group and a fourth group of colors in sequence by using magenta ink, cyan ink and yellow ink; and step four, using the two-dimensional code dot printing plate as a fifth group of printing plates of the printing machine, and printing by using carbon-containing black ink. The invention has the advantages of ensuring the clearness and integrity of the invisible codes, ensuring the click-to-read effect and optimizing the recognition and reading of the click-to-read contents.)

1. A printing process for reading printed matters is characterized by comprising the following steps:

step one, adjusting the publishing precision of a printing plate;

step two, printing by using carbon-free special gray ink as a first group of colors of the printer;

printing a second group, a third group and a fourth group of colors in sequence by using magenta ink, cyan ink and yellow ink;

and step four, using the two-dimensional code dot printing plate as a fifth group of printing plates of the printing machine, and printing by using carbon-containing black ink.

2. The printing process of the point-reading presswork according to claim 1, wherein the special gray ink is composed of magenta ink, cyan ink and yellow ink, and the weight ratio of the magenta ink, the cyan ink and the yellow ink is (3-3.4): (3.4-3.8): (3-3.4).

3. The process of printing a point-read printed matter according to claim 2, wherein the weight ratio of the magenta ink, the cyan ink and the yellow ink in the special gray ink is (3.2-3.4): (3.6-3.8): (3.2-3.4).

4. The process for printing a point-read printed matter according to any one of claims 1 to 3, wherein the point-read printed matter printed in all the steps from the second step to the fourth step is irradiated with ultraviolet light, and the ultraviolet-curable printing ink is used for the special gray ink, the yellow ink, the cyan ink, the magenta ink and the black ink.

5. The printing process of the point-reading printed matter according to claim 4, wherein the ultraviolet light irradiation device adopts a UV-LED lamp.

6. The printing process of the point-reading printed matter as claimed in claim 5, wherein the UV-LED lamps used after the printing in the second step and the printing in the fourth step are set as two groups, and the UV-LED lamps used after the printing in the third step are set as one group.

7. The process of printing a point-read printed matter according to claim 6, wherein the ink printing thickness in the second to fourth steps is set to 2 to 4 μm.

8. The process of claim 1, wherein in any one of the second step to the fourth step, the ink used in all the steps of the second step to the fourth step is transferred by static electricity during the printing process.

Technical Field

The invention relates to the field of printing processes, in particular to a printing process for point-reading printed matters.

Background

The talking pen is matched with the printed product printed with the invisible codes, so that the silent book can be changed into the audio book. The point reading pen is also called invisible code optical identification point reading device, and the interior of the point reading pen comprises a sensing head, an image decoding circuit, an audio decoding circuit based on MP3 technology, a storage, a power supply, a sound generating device and the like. The sensing head senses the two-dimensional invisible codes printed on printed products, code values are identified through the image decoding circuit, the code values are transmitted to the audio decoding circuit based on the MP3 technology through the communication interface, the MP3 technology is mainly adopted in the storage to synthesize voice, a large number of voice files are packaged into the voice file packaging technology of one file, index information corresponding to the invisible codes in a one-to-one mode is established on the packaged files, the decoding circuit sends out corresponding voice files stored in the storage through pronunciation equipment according to the code values, and the purpose that reading is carried out on the basis of points is achieved.

Because the reading pen is required to sound correctly at any page and any point of the book, special requirements are provided for the printing process. The point reading pen recognizes according to the carbon black contained in the two-dimensional invisible code, so that the ink of the rest black part in the printed product cannot contain the carbon black, otherwise, the recognition of the point reading pen is interfered. When the printing quality of the invisible codes in the printed products is poor, the recognition of the point reading pen is influenced, so that the printing effect of the invisible codes determines the quality of the printed products. In the existing printing process, one-time printing is generally adopted, and two-dimensional code dots are placed in a first group for printing and then are superposed in other colors.

The inventor thinks that the mode has the defects of easily causing the loss and the defect of two-dimensional code points and influencing the identification and the reading of the point reading pen.

Disclosure of Invention

Aiming at the problems of poor printing effect and poor point reading effect of invisible codes in the prior art, the invention aims to provide the printing process of the point reading presswork, and the printing process of the point reading presswork has the advantages of ensuring the clearness and the integrity of the invisible codes, ensuring the point reading effect, optimizing and identifying and reading the point reading content.

In order to achieve the first object, the invention provides the following technical scheme:

a printing process for reading printed matters is characterized by comprising the following steps:

step one, adjusting the publishing precision of a printing plate;

step two, printing by using carbon-free special gray ink as a first group of colors of the printer;

printing a second group, a third group and a fourth group of colors in sequence by using magenta ink, cyan ink and yellow ink;

and step four, using the two-dimensional code dot printing plate as a fifth group of printing plates of the printing machine, and printing by using carbon-containing black ink.

By adopting the technical scheme, the process takes the prepared special gray ink as a first group of colors for printing, takes the carbon-containing black ink as a fifth group of colors for printing the two-dimensional code points, adopts the traditional mode to carry out the arrangement printing of three primary colors in the intermediate step, namely prints the two-dimensional code points after all the other colors are printed, thereby ensuring the definition and the accuracy of the two-dimensional code points and ensuring the printing effect; in the related technology, when the two-dimension code dot printing plate is placed in the first group for printing, in the overprinting process of subsequent colors, the color of the overlapped printing is easy to cover the printed two-dimension code dots, and the two-dimension code dots are lost or lost in the subsequent multiple overlapped printing processes, so that the recognition effect of the point reading pen is influenced; in addition, when the dark color system color is printed in the second, third and fourth groups, the display degree of the dark color system color is affected due to the existence of the black ink printed initially, which results in inaccurate color display of the printed matter and affects the printing effect.

Further, the special gray ink consists of magenta ink, cyan ink and yellow ink, and the weight ratio of the magenta ink to the cyan ink to the yellow ink is (3-3.4): (3.4-3.8): (3-3.4).

By adopting the technical scheme, the special gray ink is prepared by three kinds of three primary color ink, namely magenta ink, cyan ink and yellow ink, so that no carbon is contained in the special gray ink, the content printed by the special gray ink is distinguished from the two-dimensional code dots printed by the carbon-containing black ink, and reading disorder of a point reading pen and influence on the reading effect of the point reading pen are avoided; theoretically, equal amounts of magenta, cyan, and yellow inks can be mixed to produce neutral gray, but the ink color effect of the inks in actual manufacturing operations is limited by industrial manufacturing conditions, and the color development capabilities of the magenta, cyan, and yellow inks are not the same, with the cyan ink having the strongest color development, so that equal amounts of magenta, cyan, and yellow inks do not produce neutral gray (which can be reddish gray), and thus the cyan ink is formulated in a higher proportion than the yellow and magenta inks in order for the magenta ink to appear to be near the black of the carbon-containing ink when viewed by the naked eye.

Further, the weight ratio of the magenta ink, the cyan ink and the yellow ink in the special gray ink is (3.2-3.4): (3.6-3.8): (3.2-3.4).

By adopting the scheme, the mass fraction of the cyan ink is higher than that of the yellow ink and the magenta ink, so that the cyan tone in the prepared special gray ink is more prominent and is closer to the hue containing carbon black visually, the hue printed by the special gray ink is close to the hue containing the carbon black, and the carbon black is not contained, so that the recognition of a point reading pen is not influenced while the printing effect is ensured.

Further, the point-read printed matter after being printed in all the steps from the second step to the fourth step is irradiated with ultraviolet light, wherein the ultraviolet curing printing ink is used for the special gray ink, the yellow ink, the cyan ink, the magenta ink and the black ink.

By adopting the scheme, the ultraviolet curing printing ink is the light-curing printing ink, and the light-curing resin is adopted as the base material, and under the irradiation of ultraviolet light, the photoinitiator contained in the light-curing resin generates free radicals to cause the polymerization and the photocrosslinking reaction of the base material, so that the curing purpose is achieved. Therefore, after the dot-read printed matter is printed by using the special gray ink, the yellow ink, the cyan ink, the magenta ink and the black ink which are set as the ultraviolet curing inks in sequence in the second step to the fourth step, the dot-read printed matter is irradiated by ultraviolet light, so that the special gray ink, the yellow ink, the cyan ink, the magenta ink and the black ink are instantly cured on the dot-read printed matter, the influence of the subsequent printing steps on the curing effect of the ink printed in the previous step is reduced, the ink printed in each step is firmly and clearly attached to the dot-read printed matter, the falling possibility of the ink layer is reduced, and the printing effect is improved.

Further, the ultraviolet irradiation equipment adopts a UV-LED lamp.

By adopting the scheme, the UV-LED lamp used by the ultraviolet light irradiation equipment adopts the light emitting diode, only emits ultraviolet light, does not emit infrared heat radiation, has high energy conversion efficiency and small heat productivity in the use process, and can reduce thermal damage to printed matters; in addition, the UV-LED lamp can be instantly lightened without preheating, so that the energy consumption is low, the use efficiency is improved, and the cost is reduced; in addition, the UV-LED lamp does not generate ozone and mercury in the using process, thereby saving energy and protecting environment; the traditional ultraviolet curing device adopts a mercury lamp to carry out ultraviolet irradiation, the common mercury lamp can generate high temperature and ozone when working, the effective energy utilization rate of the mercury lamp is only 25%, the rest 50% of the energy is converted into infrared light, and the rest 25% of the energy is converted into visible light, so the ultraviolet curing device also needs to be provided with a device for cooling and removing the ozone, and meanwhile, the mercury lamp is slowly opened and closed to influence the service life of the ultraviolet curing device, so the ultraviolet curing device needs to be always ignited in the using process, and the energy consumption is higher.

Furthermore, the UV-LED lamps used after the printing in the second step and the printing in the fourth step are set into two groups, and the UV-LED lamps used after the printing in the third step are set into one group.

By adopting the scheme, the deep color ink used in the second step and the fourth step can be fully cured, so that incomplete curing of the deep color ink caused by weak ultraviolet penetration is avoided, and further the ink is easy to strip off to influence the printing effect; in addition, the UV-LED lamps used in the third factor are arranged in one group, so that the condition that the magenta ink, the cyan ink and the yellow ink are completely cured is ensured, and the phenomenon that the surface of the point-reading printed product is excessively irradiated by ultraviolet rays to cause over-curing is reduced, so that the overlapping effect with the rest of ink is influenced.

Further, the ink printing thickness in the second to fourth steps is set to 2 to 4 μm.

By adopting the scheme, when the printing thickness of the printing ink is within the range of 2-4 mu m, the wear resistance and the adhesive force of the printing ink layer can be ensured; when the printing thickness of the ink is too low, the wear resistance is poor, and when the printing thickness of the ink is too high, the intensity of ultraviolet light which penetrates through the coating and reaches the interface between the base material and the coating is weakened, so that the bottom of the coating is difficult to completely cure, and the adhesive force of the coating is influenced.

Further, in any one of the second step to the fourth step, the ink used in all the steps of the second step to the fourth step is transferred in the printing process through static electricity.

Through adopting above-mentioned scheme, because in intaglio printing, printing ink is stored in the pocket of printing plate, and the printing machine passes through pressure and shifts printing ink to the material of bearing printing on, but in this engineering, because printing ink has the stickness, and printing ink has reasons such as adhesive force to the printing plate, printing ink can not obtain fully shifting, consequently can form hourglass white on the printed matter, especially when printing the site, it can be very obvious to leak white phenomenon to lead to two-dimensional code point printing effect poor, influence the recognition effect of point-and-read pen. In order to improve the phenomenon, the ink on the printing is absorbed on a printing stock by using an electrostatic ink absorption method, so that the ink transfer rate can be improved by 20 percent, the service life of a machine is prolonged, the fine layers of the printed matter are reproduced abundantly, and the quality and the grade of the printed matter are greatly improved. The impression cylinder of the printing machine is conductive, when printing, an electrostatic high-voltage generator is used to generate an electric field between the printing plate and the impression cylinder, and the ink in the ink holes of the printing plate is attracted to the printing stock by virtue of electrostatic attraction.

In conclusion, the invention has the following beneficial effects:

1. according to the invention, the two-dimensional code dot printing plate is used as the fifth group of colors (namely the last step) of the printing machine, carbon-containing black ink is used for printing, and the two-dimensional code dots are placed in the fifth group (namely the last group) for printing, so that the loss or deletion of the two-dimensional code dots caused by the subsequent printing process is avoided, the invisible codes are ensured to be clear and complete, the click-to-read effect is ensured, and the effect of recognizing and reading the click-to-read content is optimized;

2. the ultraviolet curing is carried out in the printing process of the point-reading printed matter, so that the curing effect of the printing ink in each step can be ensured, and the printing effect is ensured;

3. and (3) performing electrostatic adsorption on the ink used in any one of the steps from the second step to the fourth step, so that uniform printing of the printed product can be ensured.

Detailed Description

The present invention will be described in further detail with reference to examples.