When using the rubber plate making method, a sensitizer is coated on the nickel net, and a bottom plate is exposed and developed. The both ends are fixed with a locking ring. There is not much difference between the direct method and the photosensitive plate making method of the plane stencil plate making. The coating thickness is based on the viscosity of the sensitizer, the coating speed and the number of times for a scan color separation operation. All the films are completed on the film preparation. Drying is good. The difference between the Western and Japanese version of the plate making method can be made with a fine edge of the graphic, printing plate The clarity, accuracy, and reproducibility are all good.
Circular screen printing plate is the development direction of high-precision printing plate. The future rotary screen printing will be based on the textile printing and dyeing department, and will be widely used in building materials, trademarks, and electronic components. Therefore, the development of circular nets with high open porosity, the use of circular nets with various structures, and the development of platemaking technology will become the subject of high-precision printing in the future. Second, the screen printing plate quality requirements a variety of plate-making methods for a variety of screen printing products, plate-making provides choice, screen printing plate structure shown in Figure 1.
No matter which kind of plate making method is used, although the materials used are different, the process is different, but the screen printing is consistent with the printability requirements of the printing plate.
The performance index can be expressed as the reproducibility of the screen printing plate. The relationship between the sharpness of the shoulder and the imprinting of the printed film on the printing surface is the square shoulder. “The three-dimensionality of the imprinting is good for the collapse of the shoulder. The ink thickness at the edges is uneven, and there is a phenomenon of imprint expansion.Bridgeability.The bridging fingerboard film image retains the original shape performance when the edges of the image film cross the mesh mesh.
Figure 1 shows three cases of good, medium, and poor bridging. Good bridging performance, image edge reproducibility is good, not affected by the screen bridge is not good, the edge of the image across the mesh will be deformed, the degree of deformation and the film material, washing and developing photosensitive film hardened and dried to install the lock The tight ring all households' tin-figure a version of the bridge of a bridge map a glue plate-making process flow chart of a screen printing structure of the printing surface of Chengyang A surface adjustment. The plate thickness is determined by the coating thickness of the nickel plating cylinder and the sensitizer. When the plate is regenerated, the sensitized layer is dissolved and removed. This is very advantageous because several anti-duplication versions are possible.
Flat net forming plate method. This plate-making method uses a stainless steel net as a base plate, and is fixed with a nickel plated metal mesh, and then plated using a general flat-screen silk-screen printing plate making method, and then made into a cylinder by using a sticking agent to make a cylinder. Printing plate. Using this method to make circular screen printing plates, it is possible to select a variety of screens and open mesh rate of the screen, and can freely choose the size ratio, but it is more difficult to make graphics in the connection part.
The process of the flat-wire forming plate making method consists of coating nickel on a flat stainless steel net, applying a sensitizer, and exposing and developing the image on a flat surface with a printing plate. After that, it was dried and then the nickel layer was etched. After that, the protective film was peeled off, rolled into a cylindrical shape, and bonded. This degree of resistance to screen printing plate printing force, the release of the screen printing plate. A reproducibility. Reproducibility refers to the ability of the screen plate to reproduce the original image.
It is reflected in the screen printing plate's accuracy, sharpness, resolution and other aspects. Screen printing plate accuracy. The precision of the screen printing plate refers to the position and dimensional accuracy of the printing plate graphic.
It relates to the methods used in the original and auxiliary materials used in the platemaking and the methods used in the plate making. The clarity of the screen plate. In photography, sharpness refers to the degree of change in edge density of an image on a film, and in silk-screen making refers to the degree of orderliness of edge of an image in both horizontal and vertical directions. It includes three elements: shoulder sharpness, bridging and flatness. Sharp shoulders. Shoulder sharpness refers to the degree of squareness of the shoulder of the film image.
Smoothness. The flatness of the side of the printed surface of the finger print film that is in contact with the substrate. The relationship between the flatness of the film and the imprinting of the film is determined by the relationship between the imprint of the film and the surface of the substrate, as shown in Fig. 1. It has good flatness, and the two surfaces are closely connected during printing. The ink flow does not cross the border. The smoothness of the film is poor, and the surface of the film is undulated with the wires and holes of the screen. The ink flow will not flow in close contact, causing the edge of the imprint to appear serrated, and every two meshes will be buckled. The shape and size of the sawtooth are not close to each other. Screen printing plate resolution. The resolution of the screen printing plate refers to the smallest image and division size that can be printed. It is related to the resolution of the printed version and the parameters of the screen. In the screen printing process, the screen is a necessary obstacle, the ink flow will be blocked by the screen, the fine images on the printing plate may not be completely printed, that is, the resolution of the print is not equal to the resolution of the film. .
It can be seen that the resolution of the screen printing plate is not equal to the resolution of the printing plate, and the resolution of the screen printing plate is not as good as that of the plate printing plate. Second printing plate thickness. The film thickness of the printing surface of the screen printing plate affects the ink layer thickness and the sharpness of the printing, especially the effect on the fine images, and even changes the gradation of the film thickness and the printing quality dot of the stencil. Values ​​and colors. When the product requires thick ink layers and thick lines, the corresponding film should be thicker. Normally, the thickness of the plate that is most conducive to ink transfer is Lin Yilin, the thickness of the screen.
Film thickness can be measured using a film thickness meter. Three screen printing plates are resistant to printing force. The resistance to force is the ability of a printing plate to withstand the number of printings.
The printing plate resistance should be compatible with the screen printing capacity. Four screen printing plate stripping. Film stripping is the degree of difficulty that the plate is removed from the screen of the plate. After the plate making fails or the printing job is completed, the film must be removed in order to regenerate the screen. The stripping operation should be simple, economical, and have minimal damage to the screen. Three silk screen platemaking process on the printing film requirements of a screen printing manuscript classification suitable for screen printing manuscript can be divided into text based on the nature of the manuscript, line manuscripts, monotone continuation of manuscripts and color continuous adjustment manuscripts and other three originals. Text and line manuscripts are generally monochromatic copy originals, and some line manuscripts are composed of lines, color blocks, or geometric figures. Such manuscripts are sometimes monochromatic when copied, and are sometimes copied into multiple colors as required. Monochrome continuous-tone originals are generally black and white, and can be made into halftones or continuous copies of originals by prepress processing. Continually color-tuned manuscripts are usually drawings, natural color negatives, natural color positives or reversal films, and natural color photographs.
The printing film is used for color separation by a camera, color separation by an electronic color separation machine, and separation by a color prepress processing system. Because of the different bases of the original, according to this characteristic, it is divided into two kinds of reflective originals and transmitted originals.
The base of the reflection original is an opaque material, and the base of the transmission original is a transparent material. Common reflections include color photographs, black and white photographs, drawings, and print reproductions.
Common transmission originals are color reversal films, color positive films and color reproduction films. Reflective originals and transmitted originals are divided into negative and negative positive images. The second screen printing on the tomb of the manuscript requires monochromatic text, line manuscripts should have enough contrast, graphic density should be above. The contrast of the continuous adjustment original should meet the separation requirements. The resolution of the manuscript should be high and the fog should be controlled below. The color, level, and sharpness of a color continuous manuscript should meet the color separation requirements.
Requirements for three-silk printing plate lining printing films The characteristics of silk printing printing plate bottom printing Screen printing printing sheets are almost the same as the offset printing film for offset printing. However, screen printing plates are based on screens, coated with photosensitive materials, and rinsed to form printing plates. In the selection of the network, suitable screen materials can be selected according to the printing requirements. Therefore, the specificity of the printing plate for screen printing is determined. The characteristics of silkscreen printing film can be divided as follows. 1 When color blocks and lines are printed in monochrome, the printing film does not need to be screened. 2 In color printing without intermediate requirements, colored versions do not use screen printing.
3 When copying a color halftone print, the print film does not require a very high number of screens. Generally, the line inch inch is used for screen color separation.
4 When making a halftone printing plate, due to the overlapping effect of the number of screen printing lines and the number of screen meshes, the moiré is easily generated.
Therefore, the matching between the screen number and the screen mesh number and the screen angle must be taken into account during the screen separation.
5 silk screen printing film is generally used Zhengyang map film. The quality requirements of screen printing platemaking process for printing plate film printing screen printing plate printing film, mainly obtained through the electronic publishing system and optical camera system, of course, can also be obtained by hand drawing and engraving.
As far as silk screen printing films are concerned, only when they meet certain quality standards can they lay a good foundation for future printing, printing, proofing and printing.
According to many years of discussion and research, it is believed that the quality requirements for screen printing platemaking process can be divided into the following graphics and network points to have enough contrast, the resolution is better.
The density values ​​of the graphic and network points are the minimum for the best graphic and dot density values ​​above. The printed text on the printing plate should be firm, ensuring that it does not come off during copying and storage. Views are neat and accurate. Clean means to observe with our normal eyes, and the film should be clean and free of dirt. It really means that the overall size of the printing film is in compliance with the requirements put forward by the customer, and the overprinting rules of a set of printing film should be completely coincident.
Circular screen printing plate is the development direction of high-precision printing plate. The future rotary screen printing will be based on the textile printing and dyeing department, and will be widely used in building materials, trademarks, and electronic components. Therefore, the development of circular nets with high open porosity, the use of circular nets with various structures, and the development of platemaking technology will become the subject of high-precision printing in the future. Second, the screen printing plate quality requirements a variety of plate-making methods for a variety of screen printing products, plate-making provides choice, screen printing plate structure shown in Figure 1.
No matter which kind of plate making method is used, although the materials used are different, the process is different, but the screen printing is consistent with the printability requirements of the printing plate.
The performance index can be expressed as the reproducibility of the screen printing plate. The relationship between the sharpness of the shoulder and the imprinting of the printed film on the printing surface is the square shoulder. “The three-dimensionality of the imprinting is good for the collapse of the shoulder. The ink thickness at the edges is uneven, and there is a phenomenon of imprint expansion.Bridgeability.The bridging fingerboard film image retains the original shape performance when the edges of the image film cross the mesh mesh.
Figure 1 shows three cases of good, medium, and poor bridging. Good bridging performance, image edge reproducibility is good, not affected by the screen bridge is not good, the edge of the image across the mesh will be deformed, the degree of deformation and the film material, washing and developing photosensitive film hardened and dried to install the lock The tight ring all households' tin-figure a version of the bridge of a bridge map a glue plate-making process flow chart of a screen printing structure of the printing surface of Chengyang A surface adjustment. The plate thickness is determined by the coating thickness of the nickel plating cylinder and the sensitizer. When the plate is regenerated, the sensitized layer is dissolved and removed. This is very advantageous because several anti-duplication versions are possible.
Flat net forming plate method. This plate-making method uses a stainless steel net as a base plate, and is fixed with a nickel plated metal mesh, and then plated using a general flat-screen silk-screen printing plate making method, and then made into a cylinder by using a sticking agent to make a cylinder. Printing plate. Using this method to make circular screen printing plates, it is possible to select a variety of screens and open mesh rate of the screen, and can freely choose the size ratio, but it is more difficult to make graphics in the connection part.
The process of the flat-wire forming plate making method consists of coating nickel on a flat stainless steel net, applying a sensitizer, and exposing and developing the image on a flat surface with a printing plate. After that, it was dried and then the nickel layer was etched. After that, the protective film was peeled off, rolled into a cylindrical shape, and bonded. This degree of resistance to screen printing plate printing force, the release of the screen printing plate. A reproducibility. Reproducibility refers to the ability of the screen plate to reproduce the original image.
It is reflected in the screen printing plate's accuracy, sharpness, resolution and other aspects. Screen printing plate accuracy. The precision of the screen printing plate refers to the position and dimensional accuracy of the printing plate graphic.
It relates to the methods used in the original and auxiliary materials used in the platemaking and the methods used in the plate making. The clarity of the screen plate. In photography, sharpness refers to the degree of change in edge density of an image on a film, and in silk-screen making refers to the degree of orderliness of edge of an image in both horizontal and vertical directions. It includes three elements: shoulder sharpness, bridging and flatness. Sharp shoulders. Shoulder sharpness refers to the degree of squareness of the shoulder of the film image.
Smoothness. The flatness of the side of the printed surface of the finger print film that is in contact with the substrate. The relationship between the flatness of the film and the imprinting of the film is determined by the relationship between the imprint of the film and the surface of the substrate, as shown in Fig. 1. It has good flatness, and the two surfaces are closely connected during printing. The ink flow does not cross the border. The smoothness of the film is poor, and the surface of the film is undulated with the wires and holes of the screen. The ink flow will not flow in close contact, causing the edge of the imprint to appear serrated, and every two meshes will be buckled. The shape and size of the sawtooth are not close to each other. Screen printing plate resolution. The resolution of the screen printing plate refers to the smallest image and division size that can be printed. It is related to the resolution of the printed version and the parameters of the screen. In the screen printing process, the screen is a necessary obstacle, the ink flow will be blocked by the screen, the fine images on the printing plate may not be completely printed, that is, the resolution of the print is not equal to the resolution of the film. .
It can be seen that the resolution of the screen printing plate is not equal to the resolution of the printing plate, and the resolution of the screen printing plate is not as good as that of the plate printing plate. Second printing plate thickness. The film thickness of the printing surface of the screen printing plate affects the ink layer thickness and the sharpness of the printing, especially the effect on the fine images, and even changes the gradation of the film thickness and the printing quality dot of the stencil. Values ​​and colors. When the product requires thick ink layers and thick lines, the corresponding film should be thicker. Normally, the thickness of the plate that is most conducive to ink transfer is Lin Yilin, the thickness of the screen.
Film thickness can be measured using a film thickness meter. Three screen printing plates are resistant to printing force. The resistance to force is the ability of a printing plate to withstand the number of printings.
The printing plate resistance should be compatible with the screen printing capacity. Four screen printing plate stripping. Film stripping is the degree of difficulty that the plate is removed from the screen of the plate. After the plate making fails or the printing job is completed, the film must be removed in order to regenerate the screen. The stripping operation should be simple, economical, and have minimal damage to the screen. Three silk screen platemaking process on the printing film requirements of a screen printing manuscript classification suitable for screen printing manuscript can be divided into text based on the nature of the manuscript, line manuscripts, monotone continuation of manuscripts and color continuous adjustment manuscripts and other three originals. Text and line manuscripts are generally monochromatic copy originals, and some line manuscripts are composed of lines, color blocks, or geometric figures. Such manuscripts are sometimes monochromatic when copied, and are sometimes copied into multiple colors as required. Monochrome continuous-tone originals are generally black and white, and can be made into halftones or continuous copies of originals by prepress processing. Continually color-tuned manuscripts are usually drawings, natural color negatives, natural color positives or reversal films, and natural color photographs.
The printing film is used for color separation by a camera, color separation by an electronic color separation machine, and separation by a color prepress processing system. Because of the different bases of the original, according to this characteristic, it is divided into two kinds of reflective originals and transmitted originals.
The base of the reflection original is an opaque material, and the base of the transmission original is a transparent material. Common reflections include color photographs, black and white photographs, drawings, and print reproductions.
Common transmission originals are color reversal films, color positive films and color reproduction films. Reflective originals and transmitted originals are divided into negative and negative positive images. The second screen printing on the tomb of the manuscript requires monochromatic text, line manuscripts should have enough contrast, graphic density should be above. The contrast of the continuous adjustment original should meet the separation requirements. The resolution of the manuscript should be high and the fog should be controlled below. The color, level, and sharpness of a color continuous manuscript should meet the color separation requirements.
Requirements for three-silk printing plate lining printing films The characteristics of silk printing printing plate bottom printing Screen printing printing sheets are almost the same as the offset printing film for offset printing. However, screen printing plates are based on screens, coated with photosensitive materials, and rinsed to form printing plates. In the selection of the network, suitable screen materials can be selected according to the printing requirements. Therefore, the specificity of the printing plate for screen printing is determined. The characteristics of silkscreen printing film can be divided as follows. 1 When color blocks and lines are printed in monochrome, the printing film does not need to be screened. 2 In color printing without intermediate requirements, colored versions do not use screen printing.
3 When copying a color halftone print, the print film does not require a very high number of screens. Generally, the line inch inch is used for screen color separation.
4 When making a halftone printing plate, due to the overlapping effect of the number of screen printing lines and the number of screen meshes, the moiré is easily generated.
Therefore, the matching between the screen number and the screen mesh number and the screen angle must be taken into account during the screen separation.
5 silk screen printing film is generally used Zhengyang map film. The quality requirements of screen printing platemaking process for printing plate film printing screen printing plate printing film, mainly obtained through the electronic publishing system and optical camera system, of course, can also be obtained by hand drawing and engraving.
As far as silk screen printing films are concerned, only when they meet certain quality standards can they lay a good foundation for future printing, printing, proofing and printing.
According to many years of discussion and research, it is believed that the quality requirements for screen printing platemaking process can be divided into the following graphics and network points to have enough contrast, the resolution is better.
The density values ​​of the graphic and network points are the minimum for the best graphic and dot density values ​​above. The printed text on the printing plate should be firm, ensuring that it does not come off during copying and storage. Views are neat and accurate. Clean means to observe with our normal eyes, and the film should be clean and free of dirt. It really means that the overall size of the printing film is in compliance with the requirements put forward by the customer, and the overprinting rules of a set of printing film should be completely coincident.
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