whats is the benefit of the black coating to the cooling pads ?

• In this paragraph, I’m going to discuss a few reasons why we are using black coating layer on the evaporative cooling pads . but Firstly i must indicate that “there is no big efficacy for this coat on the cooling process ” , on the other hand we have two reasons to do this black coat . 1- Prevents the accumulation of salt, fungi, minerals and germs : •…