Seven, graphic distortion or incomplete
1. Phenomenon: Incomplete printing of websites and texts.
2. Reasons: (1) The roundness of the roller is not enough; (2) The surface of the roller is dirty and not smooth; (3) The pressure at both ends is unbalanced; (4) The substrate is not suitable for wrinkling or tension, and the smoothness is poor. The fibers are unevenly arranged; (5) The ink roller in the ink fountain does not rotate smoothly; (6) The viscosity of the ink is too high and the flowability is poor; (7) The ink is volatilized too quickly; The ink transfer roller absorbs less ink. Insufficient supply of ink, interrupted printing transfer incomplete; (8) poor quality of the printing plate (ozone concentration is too high, local unevenness); (9) uneven paste, so that after the imprint graphics deformation. The printing plate is repeatedly peeled off and affixed, the plate material itself is deformed, and the printing picture and text are deformed; (10) The plate diameter is selected incorrectly, causing the printing plate to be deformed greatly. A flexographic plate is a plate with high elasticity. After being mounted on a plate roll, the flexographic plate will inevitably affect the image, graphics, and characters on the surface of the plate, so that the printed product cannot properly reproduce the original, and even causes severe deformation.
3, the solution: (1) replacement of qualified roller; (2) cleaning; (3) adjust the pressure. When the printing pressure is too small: the transfer of printing graphics is not complete. Dots are not true, and the color is grayish. Make the original defects of printing plates and paper more visible. When printing pressure is too high, it will cause graphic lines to be distorted and the prints will be enlarged. Compared with the normal pressure and friction conditions, the wear of the printing plate is increased and the printing force is reduced. Increasing the machine load will increase the power consumption. At the same time, the pressure-receiving part will have greater bearing capacity and affect the working life of the parts; (4) replacement of printing materials; (5) adjustment to enable flexible rotation; (6) adjustment of viscosity; (7) adjustment of ink; (8 ) Reasonable transmission of ink; (9) Strictly check the flatness and graphic integrity. Products based on images should be reviewed or taken into consideration in the manuscript, from the image to the tone, gradation, color, sharpness and three-dimensional effect. Text-based, from the text of the correct, in line with the typesetting rules, check the uniform ink . The plate maker re-calculates the deformation rate; re-stencils; (10) Select the standard, the correct double-sided plate adhesive tape, and the plate roller diameter as far as possible in the case of the correct printing plate standard.
1. Phenomenon: Incomplete printing of websites and texts.
2. Reasons: (1) The roundness of the roller is not enough; (2) The surface of the roller is dirty and not smooth; (3) The pressure at both ends is unbalanced; (4) The substrate is not suitable for wrinkling or tension, and the smoothness is poor. The fibers are unevenly arranged; (5) The ink roller in the ink fountain does not rotate smoothly; (6) The viscosity of the ink is too high and the flowability is poor; (7) The ink is volatilized too quickly; The ink transfer roller absorbs less ink. Insufficient supply of ink, interrupted printing transfer incomplete; (8) poor quality of the printing plate (ozone concentration is too high, local unevenness); (9) uneven paste, so that after the imprint graphics deformation. The printing plate is repeatedly peeled off and affixed, the plate material itself is deformed, and the printing picture and text are deformed; (10) The plate diameter is selected incorrectly, causing the printing plate to be deformed greatly. A flexographic plate is a plate with high elasticity. After being mounted on a plate roll, the flexographic plate will inevitably affect the image, graphics, and characters on the surface of the plate, so that the printed product cannot properly reproduce the original, and even causes severe deformation.
3, the solution: (1) replacement of qualified roller; (2) cleaning; (3) adjust the pressure. When the printing pressure is too small: the transfer of printing graphics is not complete. Dots are not true, and the color is grayish. Make the original defects of printing plates and paper more visible. When printing pressure is too high, it will cause graphic lines to be distorted and the prints will be enlarged. Compared with the normal pressure and friction conditions, the wear of the printing plate is increased and the printing force is reduced. Increasing the machine load will increase the power consumption. At the same time, the pressure-receiving part will have greater bearing capacity and affect the working life of the parts; (4) replacement of printing materials; (5) adjustment to enable flexible rotation; (6) adjustment of viscosity; (7) adjustment of ink; (8 ) Reasonable transmission of ink; (9) Strictly check the flatness and graphic integrity. Products based on images should be reviewed or taken into consideration in the manuscript, from the image to the tone, gradation, color, sharpness and three-dimensional effect. Text-based, from the text of the correct, in line with the typesetting rules, check the uniform ink . The plate maker re-calculates the deformation rate; re-stencils; (10) Select the standard, the correct double-sided plate adhesive tape, and the plate roller diameter as far as possible in the case of the correct printing plate standard.
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