(1) too much dry oil.
1 Ink particles become thicker and tend to accumulate on the printing plate graphic part and the blanket. The sense of blank part increases, the viscosity of the ink increases, and the printing plate becomes dirty.
Solution: Add Vaseline or Stop Dry Oil to the ink, add 1% to 5%. When the situation is serious, clean the ink roller, add appropriate amount of new ink (without dry oil), and mix it before use.
2 The ink flowability is reduced, the ink on the printing plate is uneven, and the phenomenon of “skinning†or “pulling†of the paper occurs during printing.
Solution: Add No. 6 varnish and No. 70 dry oil, mix and use.
3 Ink ink conjunctiva prematurely, blotting and crystallization, the surface of the blot loses its adsorption force, and the latter color cannot be printed.
Solution: Use food base and boiling water, according to the proportion of 1:30 into the wetting liquid, on the machine water, preferably with the overprint.
4 Wetting fluid concentration is too high, causing the print to quit.
Solution: Add new ink, mix thoroughly and reduce the pH of the dampening solution.
(2) too little dry oil.
1 Imprinting is not easy to dry, affecting the smooth progress of the next color overlay.
Solution: Stop quickly, add proper amount of dry oil, and increase drying speed.
2 Imprinting is fuzzy, easy to produce powder and the product is dull.
Solution: Add appropriate amount of red dry oil, dry white oil. Light-colored ink should not be added to dry red oil.
3 The back of the print is dirty.
Solution: Add appropriate amount of dry oil and anti-adhesion agent, and take measures such as splint, dusting and other measures. 4
1 Ink particles become thicker and tend to accumulate on the printing plate graphic part and the blanket. The sense of blank part increases, the viscosity of the ink increases, and the printing plate becomes dirty.
Solution: Add Vaseline or Stop Dry Oil to the ink, add 1% to 5%. When the situation is serious, clean the ink roller, add appropriate amount of new ink (without dry oil), and mix it before use.
2 The ink flowability is reduced, the ink on the printing plate is uneven, and the phenomenon of “skinning†or “pulling†of the paper occurs during printing.
Solution: Add No. 6 varnish and No. 70 dry oil, mix and use.
3 Ink ink conjunctiva prematurely, blotting and crystallization, the surface of the blot loses its adsorption force, and the latter color cannot be printed.
Solution: Use food base and boiling water, according to the proportion of 1:30 into the wetting liquid, on the machine water, preferably with the overprint.
4 Wetting fluid concentration is too high, causing the print to quit.
Solution: Add new ink, mix thoroughly and reduce the pH of the dampening solution.
(2) too little dry oil.
1 Imprinting is not easy to dry, affecting the smooth progress of the next color overlay.
Solution: Stop quickly, add proper amount of dry oil, and increase drying speed.
2 Imprinting is fuzzy, easy to produce powder and the product is dull.
Solution: Add appropriate amount of red dry oil, dry white oil. Light-colored ink should not be added to dry red oil.
3 The back of the print is dirty.
Solution: Add appropriate amount of dry oil and anti-adhesion agent, and take measures such as splint, dusting and other measures. 4
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