Functional magnetic roller

Is the print quality of the magnetic pulley blackness affect one of the largest components, black coating thickness and roughness will change with constant use. After a toner adsorbed on the magnetic roller blown off, if the black coating on the magnetic roller looks very thin, and even see the aluminum color or surface looks very light, then the print quality produced by such a magnetic rollers will be shallow, you should get a new magnetic roller or a magnetic roller sleeve