How is the cross print produced on the copper strip surface caused?

Answer:

Another reason is that the hydraulic oil leak directly drops the hydraulic oil on the surface of the copper strip, and then rolling can cause light and shade.

Rolling oil (emulsion) is mainly mixed with hydraulic oil, or after long-term use, the quality is bad, can't even produce corrosion lubrication of high speed roll, roll or strip (rolling not timely cleaning after copper lines prone to corrosion).

The main reason is that the roller and rolling oil (emulsion) are the main reasons, but the roller is not broken and the roller is not cleaned;