Common problems in printing workshops-horizontal stripes

Axial (horizontal) light or dark streaks appearing on the surface of the printed image are called lifters.

There are many reasons for the horizontal starting bar. In addition to the improper adjustment of the equipment, the screening method is also a reason. In addition, the powder or paper powder accumulated on the rubber, the printing plate or rubber is bad or damaged, and the supply of ink or fountain solution or even the quality of the ink can cause problems. The state of the machine itself may also cause bumps, such as poor arrangement and adjustment of the ink roller, improper roller padding (too much pressure), etc. The traversing plate rollers often cause similar stripes on the layout.

solution

• Treat and restore the surface state of the rubber roller with a suitable cleaning paste every week to remove surface deposits • Correctly adjust the pressure of the ink roller and regularly check and maintain it • Replace the rubber roller that is hardened and the surface is mirrored and worn • Carefully adjust the ink Rollers • The water string rollers should be kept clean and hydrophilic • The roller bearings should be kept in good working condition • Properly lubricate the roller bearings • Minimize the pressure on the plate surface of the plate rollers to minimize impact • Keep the shoulder iron clean and oil-free • The roller The liner paper must be clean, the size is cut to fit and installed correctly • The pressure between the plate cylinder and the rubber cylinder should be set between 0.1mm and a maximum of 0.13mm • Print with as little printing pressure as possible

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