What are the scratches and water splashing on the bucket roller of Heidelberg MO printing machine?

Droplet-like white spots or drop-like lack of color are occasionally seen on printed matter, which is due to the fact that when water drops drop on the printing paper and instantly pass through the pressure of embossing and blanket cylinder, the transfer of pictures and texts on the blanket to the printing paper is hindered.

How to avoid the formation and dripping of water droplets is the key. Firstly, check whether the water level in the tank is too high and there is water overflow, and secondly, check whether the water pressure in the waterway is parallel, so as to avoid the local water film being too thick and forming the water throwing factor. Another thing to note is the relationship between the water temperature of fountain and the temperature and humidity of printing workshop. Due to the high humidity in the printing workshop, the moisture in the air forms water droplets, which hang on the outer wall of the sink for a long time and may fall at any time. The treatment method is to rub it a few times more, and the other is that there is no printing process.