The addition amount of the fountain solution is generally controlled at 2% to 3%, but if the necessary measurement tools are missing or if the automatic extraction equipment fails, the operator can often only add by experience, which leads to the There are many problems in the control of the dosage of the liquid.
If the amount of the fountain solution is too small, the printing plate may be dirty and the machine may take a long time to adjust. It is difficult to achieve ink balance, and it is difficult to obtain a satisfactory ink effect, which increases the risk of machine corrosion. If the amount of fountain solution is too large, the ink is easy to over-emulsify, and the ink is not easy to control; ink throwing and ink flying occur, and the water bucket and the water roller are polluted; the ink roller is not inked and the ink is easily accumulated on the blanket.
In order to solve these problems, a standard measuring tool is required to manually add the fountain solution to ensure the quantitative addition; if there is an automatic adding device, it should be regularly checked and maintained to ensure its normal operation.
When using modern new fountain solution, the amount of alcohol added should be controlled within 10%. Generally, the operator will think that the greater the amount of alcohol added, the more difficult it is to contaminate the plate, so the amount of alcohol is always too large. In actual fact, when the amount of alcohol is too high, the dissolution of the surface of the paper will be intensified, and the printed paper is prone to paper powder. The ink is easily over-emulsified and affects the quality of the printed product.
The two parameters of pH and conductance are usually used to reflect the condition of the fountain solution and monitor it. Tests have shown that when the pH value is within the range of 4.8 to 5.3, the printing is the most stable, the longest printing plate life, the best quality of the printing ink, the ink and ink balance are the most easy to control, and the pH value is not only determined by the addition amount of the fountain solution, but also by the paper. Acid and alkali effects. The conductivity should generally be controlled at (1400 ± 200) μs. The conductance value is easily affected by the hardness of the water, the amount of alcohol, dust and ink mixed in, so the conductivity value is allowed in 800 ~ 2000μs, but when the fountain solution looks obvious If it has been contaminated, it must be reconstituted.
If the amount of the fountain solution is too small, the printing plate may be dirty and the machine may take a long time to adjust. It is difficult to achieve ink balance, and it is difficult to obtain a satisfactory ink effect, which increases the risk of machine corrosion. If the amount of fountain solution is too large, the ink is easy to over-emulsify, and the ink is not easy to control; ink throwing and ink flying occur, and the water bucket and the water roller are polluted; the ink roller is not inked and the ink is easily accumulated on the blanket.
In order to solve these problems, a standard measuring tool is required to manually add the fountain solution to ensure the quantitative addition; if there is an automatic adding device, it should be regularly checked and maintained to ensure its normal operation.
When using modern new fountain solution, the amount of alcohol added should be controlled within 10%. Generally, the operator will think that the greater the amount of alcohol added, the more difficult it is to contaminate the plate, so the amount of alcohol is always too large. In actual fact, when the amount of alcohol is too high, the dissolution of the surface of the paper will be intensified, and the printed paper is prone to paper powder. The ink is easily over-emulsified and affects the quality of the printed product.
The two parameters of pH and conductance are usually used to reflect the condition of the fountain solution and monitor it. Tests have shown that when the pH value is within the range of 4.8 to 5.3, the printing is the most stable, the longest printing plate life, the best quality of the printing ink, the ink and ink balance are the most easy to control, and the pH value is not only determined by the addition amount of the fountain solution, but also by the paper. Acid and alkali effects. The conductivity should generally be controlled at (1400 ± 200) μs. The conductance value is easily affected by the hardness of the water, the amount of alcohol, dust and ink mixed in, so the conductivity value is allowed in 800 ~ 2000μs, but when the fountain solution looks obvious If it has been contaminated, it must be reconstituted.
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