The reason for the insufficient brightness and water marks on the surface of the aluminum plate

Water marks are caused by:

Poor water quality or water is not wiped clean and remains on the surface of the aluminum plate.

The surface of the aluminum plate is not bright enough, which may be:

The rolling temperature is too high, or the surface roughness of the magazine roller is not enough;

The lubricating fluid performance is not good enough and is too dirty;

The material of the aluminum plate is inconsistent, resulting in a dull surface.