The machine is equipped with stepless water feed adjustment, which allows complete and effective dampening control, suitable for all type of plates. The standard dampening system is formed by a set of 5 rollers, and with a vibrator roller. The vibrator and metering roller as well as the water trough are made of high quality standard steel ensuring their long life services. The dampening unit is removable and thus can be cranked out to facilitate roller changes and adjustments.