2026-04-14
(1) Emulsify water and ink properly. Due to excessive emulsification, the color paste in the ink will be diluted, and the "water window" phenomenon will appear in the printed product;
(2) Protect the PS plate. Since the diameters of the printing plate cylinder and the rubber cylinder are sometimes not exactly equal, and their running linear speeds are also different during printing, the phenomenon of "dry grinding" appears on the "tangent point" of the cylinder. At this time, the fountain solution acts as a lubricant to reduce the friction between the two;
(3) Protect the blanket. The friction between any objects will generate heat. Since the PS plate is made of aluminum and has a large thermal conductivity, the heat has little effect on it, while the blanket is the opposite. At this time, the function of the fountain solution is to reduce heat and protect the blanket;
(4) Make the non-graphic part of the printing plate not to be inked. Offset printing is printed according to the principle of oil and water repelling each other. After the PS plate is exposed and developed, ink can be attached to its surface sensing part (ie, the graphic part), and the phenomenon of "dirty" will appear at this time.
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