Substrate adhesion, picking fault causes: 1, ink quit; 2, rewinder tension too much; 3, storage room temperature is too high; exclusion: 1, increase the drying temperature; 2, reduce rewind tension; 3 Printing products in cool places;
Paste, blocking version of the reasons for the failure: 1, printing plate is too shallow; 2, printing pressure is too great; 3, too much ink supply; 4, ink viscosity is too high; 5, ink drying speed is too fast; exclusion: 1, Deepen the printing plate; 2, Adjust the printing pressure; 3, Reduce the amount of ink supply; 4, Reduce the viscosity of the ink; 5, Reduce the drying temperature.
Poor stacking fault causes: 1, multi-color overprint India and India behind the color, the former color is not dry; 2, the color of the post-printing so that the former color peeling phenomenon; 3, the color printing after the printing does not go up. Remedy: 1, to increase the drying speed of the first color; 2, to reduce the viscosity of the ink after printing or reduce the printing pressure; 3, reduce the viscosity of the latter color or increase its adhesion.
Printed pinhole failure causes: Ink on the roller to dry too fast, uneven ink transfer; Remedy: slow down the ink drying speed;
The color is too shallow Fault causes: 1, the ink viscosity is too low; 2, anilox roller wire is too thin; 3, anilox roller wear or not clean; 4, ink is too small.
Remedy: 1, increase the viscosity of the ink; 2, replace the coarse mesh of the anilox roller or the anilox roller thoroughly cleaned; 4, reduce the pressure of the roller or squeegee or increase the appropriate version of the roller pressure (gravure), Speed ​​up printing (flexo).
The color is too deep Fault causes: 1, the viscosity of the ink is too high; 2, the anilox roller is too thick; 3, the ink color saturation is too high; 4, the ink is too much. Remedy: 1, add thinner to reduce the viscosity; 2, fine anilox roller; 3, add withdrawal agent to reduce the color depth; 4, increase the pressure of the anilox roller or squeegee or reduce the plate roller pressure (gravure) .
Printed spots have troubles: 1. The thickness of the plastic film is not uniform; 2. The ink is too thin; 3. The viscosity of the ink is large; 4. The printing plate is unevenly painted. Remedy: 1, replace the thickness of the thin film; 2, add new ink; 3, increase the viscosity of the ink; 4, from the ink and ink to check the reasons for uneven ink transfer.
Ink unevenness causes: 1. The silver coin is not even; 2. The thickness of the substrate is not uniform; 3. The ink is uneven, such as anilox roller wear; 4. The number of anilox roller lines is too low. Remedy: 1, grinding behind the printing plate, or paste adhesive correction; 2, replace the uniform thickness of the substrate; 3, replace the anilox roller.
The edge of the line hair hair failure causes: 1, the ink drying speed is too fast; 2, the pressure is uneven, the pressure is not properly adjusted; 3, the impact of environmental dust. Remedy: 1. Reduce the drying speed of the ink; 2. Adjust the pressure between the printing plate and the anilox roller; 3. Reduce the environmental dust.
Overprinting is not allowed to cause failures: 1. The unevenness of the tension of the receiving and discharging materials; 2. The film has a lotus leaf edge; 3. The film joint is uneven; 4. The pressure of the previous color is too large to deform the image. Remedy: 1, adjust the income, discharge tension; 2, adjust the tension, replace the film; 3, re-connector; 4, adjust the printing pressure.
Poor print fastness Causes of failure: 1. The lack of plastic film corona treatment; 2. Poor printability of plastic film; 3. Insufficient adhesion of ink. Remedy: 1, plastic film re-treatment, the surface tension required to deal with more than 40 dyne; 2, replace the plastic film; 3, to the company proposed improvement requirements.
Color instability Causes of malfunction: 1. Viscosity changes in viscosity; 2. Incorrect operation; 3. Incorrect ink distribution. Remedy: 1. Check the viscosity and PH value and the previous printing has changed; 2. Check the operating procedures; 3. Respond to the company's response to quality accidents.
Foaming failure causes: 1, the printing speed is too fast; 2, add too much thinner or high hardness of tap water. Remedy: Add defoamer.
Drying speed is too fast. Causes of failure: 1, the printing speed is too slow; 2, open for too long; 3, the ink drying speed is too fast; 4, the drying temperature is too high. Remedy: 1, increase the printing speed; 2, adding thinner; 3, adding slow-drying agent adjustment; 4, lower drying temperature, or even without drying system.
Drying speed is too slow Cause: 1, printing speed is too fast; 2. ink drying speed is too slow; 3, drying temperature is low. Remedy: 1, reduce the printing speed; 2, add slow-drying agent; 3, increase the drying temperature. (China Packaging News and Printing Weekly)
Paste, blocking version of the reasons for the failure: 1, printing plate is too shallow; 2, printing pressure is too great; 3, too much ink supply; 4, ink viscosity is too high; 5, ink drying speed is too fast; exclusion: 1, Deepen the printing plate; 2, Adjust the printing pressure; 3, Reduce the amount of ink supply; 4, Reduce the viscosity of the ink; 5, Reduce the drying temperature.
Poor stacking fault causes: 1, multi-color overprint India and India behind the color, the former color is not dry; 2, the color of the post-printing so that the former color peeling phenomenon; 3, the color printing after the printing does not go up. Remedy: 1, to increase the drying speed of the first color; 2, to reduce the viscosity of the ink after printing or reduce the printing pressure; 3, reduce the viscosity of the latter color or increase its adhesion.
Printed pinhole failure causes: Ink on the roller to dry too fast, uneven ink transfer; Remedy: slow down the ink drying speed;
The color is too shallow Fault causes: 1, the ink viscosity is too low; 2, anilox roller wire is too thin; 3, anilox roller wear or not clean; 4, ink is too small.
Remedy: 1, increase the viscosity of the ink; 2, replace the coarse mesh of the anilox roller or the anilox roller thoroughly cleaned; 4, reduce the pressure of the roller or squeegee or increase the appropriate version of the roller pressure (gravure), Speed ​​up printing (flexo).
The color is too deep Fault causes: 1, the viscosity of the ink is too high; 2, the anilox roller is too thick; 3, the ink color saturation is too high; 4, the ink is too much. Remedy: 1, add thinner to reduce the viscosity; 2, fine anilox roller; 3, add withdrawal agent to reduce the color depth; 4, increase the pressure of the anilox roller or squeegee or reduce the plate roller pressure (gravure) .
Printed spots have troubles: 1. The thickness of the plastic film is not uniform; 2. The ink is too thin; 3. The viscosity of the ink is large; 4. The printing plate is unevenly painted. Remedy: 1, replace the thickness of the thin film; 2, add new ink; 3, increase the viscosity of the ink; 4, from the ink and ink to check the reasons for uneven ink transfer.
Ink unevenness causes: 1. The silver coin is not even; 2. The thickness of the substrate is not uniform; 3. The ink is uneven, such as anilox roller wear; 4. The number of anilox roller lines is too low. Remedy: 1, grinding behind the printing plate, or paste adhesive correction; 2, replace the uniform thickness of the substrate; 3, replace the anilox roller.
The edge of the line hair hair failure causes: 1, the ink drying speed is too fast; 2, the pressure is uneven, the pressure is not properly adjusted; 3, the impact of environmental dust. Remedy: 1. Reduce the drying speed of the ink; 2. Adjust the pressure between the printing plate and the anilox roller; 3. Reduce the environmental dust.
Overprinting is not allowed to cause failures: 1. The unevenness of the tension of the receiving and discharging materials; 2. The film has a lotus leaf edge; 3. The film joint is uneven; 4. The pressure of the previous color is too large to deform the image. Remedy: 1, adjust the income, discharge tension; 2, adjust the tension, replace the film; 3, re-connector; 4, adjust the printing pressure.
Poor print fastness Causes of failure: 1. The lack of plastic film corona treatment; 2. Poor printability of plastic film; 3. Insufficient adhesion of ink. Remedy: 1, plastic film re-treatment, the surface tension required to deal with more than 40 dyne; 2, replace the plastic film; 3, to the company proposed improvement requirements.
Color instability Causes of malfunction: 1. Viscosity changes in viscosity; 2. Incorrect operation; 3. Incorrect ink distribution. Remedy: 1. Check the viscosity and PH value and the previous printing has changed; 2. Check the operating procedures; 3. Respond to the company's response to quality accidents.
Foaming failure causes: 1, the printing speed is too fast; 2, add too much thinner or high hardness of tap water. Remedy: Add defoamer.
Drying speed is too fast. Causes of failure: 1, the printing speed is too slow; 2, open for too long; 3, the ink drying speed is too fast; 4, the drying temperature is too high. Remedy: 1, increase the printing speed; 2, adding thinner; 3, adding slow-drying agent adjustment; 4, lower drying temperature, or even without drying system.
Drying speed is too slow Cause: 1, printing speed is too fast; 2. ink drying speed is too slow; 3, drying temperature is low. Remedy: 1, reduce the printing speed; 2, add slow-drying agent; 3, increase the drying temperature. (China Packaging News and Printing Weekly)
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