4. The printing plate is to be flattened, and the gravure plate can be used for the gravure plate to reduce the thickness of the emulsion film, reduce the normal exposure time, increase the time during the development, and can be used to etch twice or to prolong the corrosion. The time allowed the small outlets to be firmer, making the printed plates (zinc plate flat rotogravures) rich in graphic and graphic layers, and reaching flat and deep graphics.
5. In order to ensure the quality control standard of the printing plate, the scientific basis of the ruler, signal bar, test strip, etc. is used to control the exposure and development of the printing plate.
After printing, pay attention to the check of the quality of the printing plate. 1. Whether the color of the printing plate conforms to the overprinting color. If the printing plate is marked with color: Y, M, C, BK, etc., just look at the color when it is on the machine. , you will know which color version, but also according to the perspective of the network to determine the color other, under normal circumstances Y version 90 °, BK45 °, M15 ° or 75 °, C 75 °, with the continuous process of plate making Improvements have also changed the angles of the above various network cables. The 45° angle of the cable gives the most visual sensitivity and the strongest sense of three-dimensionality. The ink plate only plays a role of insufficient ink filling and strengthens the impression of Guo Guo. Therefore, the angle of 45° of the cable is used as the main color of the screen. . Mainly based on portraits, M version 45°, Y edition 90°, BK75°, C edition 15°, print version C 45°, Y edition 90°, BK edition 75° or 15° mainly based on landscape pictures, M Version 15° or 75°, black and white version of BK is generally 45°, medium and dark gray can be selected at any angle.
At the same time, the color plate can also be distinguished according to the depth and characteristics of the printed pattern and the pattern of the Internet.
You can tell the color difference of printing plate by comparing the depth of the printing plate with the printing sample or the monochromatic sample.
2. Check the virtual version of the outlets. The printed version can be observed with a 5-10x magnifying glass. If the outlets are hairy, grayish or even white, not round, this indicates that the outlets are not strong, and the fat sensory performance of the outlets will not be good. On the contrary, if the outlets are sticky, full and solid, the blackness is above 2.30, and the blank part is not. With dirty, clear, this shows that the network quality meets the printing requirements.
3. The inspection of tone and depth of the printing plate mainly depends on whether the level of the printing plate layout is rich or not, whether it meets the requirement of the printing sample (monochrome type), and mainly checks the three points of the printing plate that are printed out, the bright tone region, the intermediate tone region, and the dark To adjust the area, request brightly adjusted areas and dark areas, and require that 3% of the bright spots in the bright area are not lost, 50% of the dots in the middle tone area do not expand or contract, do not expand significantly, and 95% of the dark spots are not pasted. The size of the outlets is basically the same as that of the printing outlets, so the depth of the printing plate meets the requirements. For example, the description of the dots is deep and the dots are small.
4. Inspection of printing plate graphic and blank space Check whether the printing and printing graphic is complete and continuous. Require that the graphic and text are not incomplete. Continued. The text and the sample are correct. For each one of the gemas and punctuation marks, it must not be missed. There are problems in time to deal with.
The blank part is checked for oxidizing dry spots, scratches, dirty spots, presence of photo-resist, and the clean, clean, and dirt-free spots on the blank area.
5. Plate size and cross-hair inspection The specification of the split printing plate is 920×760mm. Before the machine is applied, the T-size ruler is used to measure the size of the printing plate. The printing plate is not standardized and is too short to be printed on the machine, especially the recycled PS. The version should be carefully checked. If the printing plate is skewed and out of order, use the scissors to trim the plate into a rectangle.
According to the position of the proof on the image, check whether the position of the printing plate is correct, whether the mouthpiece and the tip are upside down, the middle of the pattern print center, the correct size of the bite, do not be skewed, the stencil of the printing plate can reach a large size. , too small, are not conducive to the correction of plate format.
Drying out the printing plate should be complete. The four corners, the middle gauge line, and the trailing line are all complete. The plate has a good level of smoothness, which reduces the marks on the PS plate. There are slight unevenness in the graphic and space. You can level the plate top with a soft object, and print it without damaging the plate. The version was flattened to facilitate uniform pressure everywhere.
5. In order to ensure the quality control standard of the printing plate, the scientific basis of the ruler, signal bar, test strip, etc. is used to control the exposure and development of the printing plate.
After printing, pay attention to the check of the quality of the printing plate. 1. Whether the color of the printing plate conforms to the overprinting color. If the printing plate is marked with color: Y, M, C, BK, etc., just look at the color when it is on the machine. , you will know which color version, but also according to the perspective of the network to determine the color other, under normal circumstances Y version 90 °, BK45 °, M15 ° or 75 °, C 75 °, with the continuous process of plate making Improvements have also changed the angles of the above various network cables. The 45° angle of the cable gives the most visual sensitivity and the strongest sense of three-dimensionality. The ink plate only plays a role of insufficient ink filling and strengthens the impression of Guo Guo. Therefore, the angle of 45° of the cable is used as the main color of the screen. . Mainly based on portraits, M version 45°, Y edition 90°, BK75°, C edition 15°, print version C 45°, Y edition 90°, BK edition 75° or 15° mainly based on landscape pictures, M Version 15° or 75°, black and white version of BK is generally 45°, medium and dark gray can be selected at any angle.
At the same time, the color plate can also be distinguished according to the depth and characteristics of the printed pattern and the pattern of the Internet.
You can tell the color difference of printing plate by comparing the depth of the printing plate with the printing sample or the monochromatic sample.
2. Check the virtual version of the outlets. The printed version can be observed with a 5-10x magnifying glass. If the outlets are hairy, grayish or even white, not round, this indicates that the outlets are not strong, and the fat sensory performance of the outlets will not be good. On the contrary, if the outlets are sticky, full and solid, the blackness is above 2.30, and the blank part is not. With dirty, clear, this shows that the network quality meets the printing requirements.
3. The inspection of tone and depth of the printing plate mainly depends on whether the level of the printing plate layout is rich or not, whether it meets the requirement of the printing sample (monochrome type), and mainly checks the three points of the printing plate that are printed out, the bright tone region, the intermediate tone region, and the dark To adjust the area, request brightly adjusted areas and dark areas, and require that 3% of the bright spots in the bright area are not lost, 50% of the dots in the middle tone area do not expand or contract, do not expand significantly, and 95% of the dark spots are not pasted. The size of the outlets is basically the same as that of the printing outlets, so the depth of the printing plate meets the requirements. For example, the description of the dots is deep and the dots are small.
4. Inspection of printing plate graphic and blank space Check whether the printing and printing graphic is complete and continuous. Require that the graphic and text are not incomplete. Continued. The text and the sample are correct. For each one of the gemas and punctuation marks, it must not be missed. There are problems in time to deal with.
The blank part is checked for oxidizing dry spots, scratches, dirty spots, presence of photo-resist, and the clean, clean, and dirt-free spots on the blank area.
5. Plate size and cross-hair inspection The specification of the split printing plate is 920×760mm. Before the machine is applied, the T-size ruler is used to measure the size of the printing plate. The printing plate is not standardized and is too short to be printed on the machine, especially the recycled PS. The version should be carefully checked. If the printing plate is skewed and out of order, use the scissors to trim the plate into a rectangle.
According to the position of the proof on the image, check whether the position of the printing plate is correct, whether the mouthpiece and the tip are upside down, the middle of the pattern print center, the correct size of the bite, do not be skewed, the stencil of the printing plate can reach a large size. , too small, are not conducive to the correction of plate format.
Drying out the printing plate should be complete. The four corners, the middle gauge line, and the trailing line are all complete. The plate has a good level of smoothness, which reduces the marks on the PS plate. There are slight unevenness in the graphic and space. You can level the plate top with a soft object, and print it without damaging the plate. The version was flattened to facilitate uniform pressure everywhere.
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