A, ink bar is flat screen or printing in the field when printing, printing plate layout and appear on the calendar the axial lines of the obvious dark streaks, commonly known as "black bar" or "black TiaoTou".
Ink bar causes and eliminating methods are:
Drum gear wear in use time, should replace a new set of gear; Printing pressure is too large, or between the plate cylinder and rubber roller pressure is too great. The appropriate pressure should be adjusted; Gears are embedded between paper, ink, leather and other contaminants. Gear between various contaminants shall be removed, adding new gear lubricating oil, to strengthen the cleaning and maintenance of the machine; Between the plate and rely on version of roller pressure is too big, should adjust depends on version of roller and printing plate pressure; Rely on version of roller surface uneven or roll core curve, not straight, should replace the ink roller; Ink is too thin, should add the right amount of 0 # ink oil, in order to enhance the ink viscosity; Paper roughness, surface strength is poor. Should frequently wash rubber cloth and add oil 6 # ink in ink to reduce ink viscosity, reducing the extent of the paper off powder, wool.
2, water bar is flat screen or printing in the field up, plate layout and appear on the calendar the axial lines of clear light streaks, commonly known as "white bar" or "white". Water bar is usually caused by the water part, reasons and the solution is:
Water roller and the main divide evenly between water roller pressure is too big, should be to adjust the pressure between them, so that it is appropriate to reduce some stress; Ink emulsification, water roll surface JiMo too much; Layout of water is too large, should reduce water, cleaning blanket, serious when cleaning the ink roller; Education version liquid acid is too strong, acidic education version should be reduced. (Gold Printing Group)