After the copper foil is peeled off from the cathode roller, the light separating surface and the rough surface are separated.
The so-called smooth surface of copper foil refers to the surface directly attached to the cathode roll - the surface of the cathode roll needs to be polished, so the smooth surface of copper foil is actually a mirror reflection of the surface of the cathode roll.
The so-called rough surface of copper foil refers to the growth surface of copper foil, which is the opposite of the smooth surface.
The two sides of the copper foil are in contact with the cathode roller and the electrolyte. The side in contact with the cathode roller is smooth, and the side in contact with electrolytic copper is rough. With this understanding, we can well understand the difference and relationship between double-sided light, double-sided wool and single-sided wool copper foil.
