1, the viscosity of the ink is too large and the viscosity of the printing Plate ink is too large. In addition to making the printing of the printing ink difficult, the conditions of the breakage in the middle of the ink layer are also destroyed, so that the remaining ink layer of the plate is insufficient, and the graphic part is exposed to wear due to wear. .
Treatment method: Add a certain amount of detackifying agent to reduce the viscosity of the ink without increasing the fluidity of the ink too much. For printing fine products, lowering the viscosity of the ink is preferable to using a release agent because it does not increase the flowability of the ink while lowering the viscosity, and it is advantageous for drying the ink. However, the dosage should be appropriate. Excessive usage will affect the gloss of the imprint. Generally, the amount of yellow ink added is 1% to 1.5%, and the other color ink is about 2%.
2, the ink viscosity is too small easy to paste version of the viscosity of the ink is easy to emulsify, resulting in floating dirty, so that the ink can not be transferred normally, so that the ink roller, printing plates and blankets gradually accumulate pigment particles. When the pigment particles accumulate to a certain thickness on the plate, it will cause a paste plate. Sometimes the layout is not enough due to insufficient ink on the layout.
Treatment method: Add some concentrate ink properly, but not too much, to avoid affecting other properties.
3, the ink flow is too large to make the general point of deformation, the lack of ink fluidity to produce floral ink flow over the General Assembly to spread the ink layer, so that the footprint geometry is expanded, the print can not be correctly copied. Insufficient ink fluidity tends to result in uneven distribution of the ink, resulting in a lack of ink for the printing plate.
Treatment method: The ink flowability is not fully adaptable to all printers, and high speed machines have greater fluidity than low speed machines. Materials that regulate the fluidity of the ink are generally No. 6 varnish and high-boiling point kerosene. But be careful not to add oil or other non-dry mineral oil to the ink.
4. Ink particles are coarse and produce coarse printing ink particles, which play an abrasive role on the printing surface. In the thousands of times rolling, the graphic basis is destroyed and the flower version is caused.
Treatment method: When printing, use ink made of pigment with small specific gravity as much as possible. For dilute color inks, clear dip or bright paste should be used as diluting agent instead of white ink.
5, dry oil in the ink too much and paste version in the printing of some operators in order to make the print quickly drying, to add a desiccant drying ink has been promoted to promote the ink roller aging, and make the ink thicker , Emulsification, so that the ink layer on the plate can not be broken from the middle, most of them remain on the plate, resulting in a plate. Under the effect of printing pressure, the ink layer on the outlet gradually expands to cause paste.
Treatment method: For stencils caused by too much dry oil, can not be solved by increasing the method of surface moisture, the old ink on the ink roller should be washed out and replaced with new ink. In the printing needs to add a suitable amount of dry oil ink, when the downtime is short, you can apply some anti-drying agent on the roller, when the downtime is long, you should clean the ink on the roller.
Treatment method: Add a certain amount of detackifying agent to reduce the viscosity of the ink without increasing the fluidity of the ink too much. For printing fine products, lowering the viscosity of the ink is preferable to using a release agent because it does not increase the flowability of the ink while lowering the viscosity, and it is advantageous for drying the ink. However, the dosage should be appropriate. Excessive usage will affect the gloss of the imprint. Generally, the amount of yellow ink added is 1% to 1.5%, and the other color ink is about 2%.
2, the ink viscosity is too small easy to paste version of the viscosity of the ink is easy to emulsify, resulting in floating dirty, so that the ink can not be transferred normally, so that the ink roller, printing plates and blankets gradually accumulate pigment particles. When the pigment particles accumulate to a certain thickness on the plate, it will cause a paste plate. Sometimes the layout is not enough due to insufficient ink on the layout.
Treatment method: Add some concentrate ink properly, but not too much, to avoid affecting other properties.
3, the ink flow is too large to make the general point of deformation, the lack of ink fluidity to produce floral ink flow over the General Assembly to spread the ink layer, so that the footprint geometry is expanded, the print can not be correctly copied. Insufficient ink fluidity tends to result in uneven distribution of the ink, resulting in a lack of ink for the printing plate.
Treatment method: The ink flowability is not fully adaptable to all printers, and high speed machines have greater fluidity than low speed machines. Materials that regulate the fluidity of the ink are generally No. 6 varnish and high-boiling point kerosene. But be careful not to add oil or other non-dry mineral oil to the ink.
4. Ink particles are coarse and produce coarse printing ink particles, which play an abrasive role on the printing surface. In the thousands of times rolling, the graphic basis is destroyed and the flower version is caused.
Treatment method: When printing, use ink made of pigment with small specific gravity as much as possible. For dilute color inks, clear dip or bright paste should be used as diluting agent instead of white ink.
5, dry oil in the ink too much and paste version in the printing of some operators in order to make the print quickly drying, to add a desiccant drying ink has been promoted to promote the ink roller aging, and make the ink thicker , Emulsification, so that the ink layer on the plate can not be broken from the middle, most of them remain on the plate, resulting in a plate. Under the effect of printing pressure, the ink layer on the outlet gradually expands to cause paste.
Treatment method: For stencils caused by too much dry oil, can not be solved by increasing the method of surface moisture, the old ink on the ink roller should be washed out and replaced with new ink. In the printing needs to add a suitable amount of dry oil ink, when the downtime is short, you can apply some anti-drying agent on the roller, when the downtime is long, you should clean the ink on the roller.
Plate
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