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  1. k640 duct roller

    end of duct rollers getting badly pitted through some sort of acidic reaction. thought it was calcium build-up until I had closer look. only 4% alcohol used in fount. also same inks as other machine but not happening there. would a calcium build-up actually do that to the duct roller? tried...

  2. yellow

    have to print yellow in first unit due to ink getting filthy. any dark solids, process etc, previous to 4th unit. water, room, board temp and types of ink change do not seem to have an effect on what is happening. any help? (ls40) :confused:
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