Chemical composition of protective paint behind mirror

After silver plating, a layer of copper is usually plated. Pure copper is red, but usually a layer of mirror back paint is plated on this basis, which can be varied. For example, the single-coated glass silver mirror back paint without copper layer consists of 7.0-8.0 wt% of metal oxide, 9.0-1.0 wt% of ultrafine talcum powder and1.0 wt% of ultrafine barium sulfate. 20.0-30.0 wt% of short oil alkyd resin, 3.0- 10.0 wt% of colored pigment, 0.05-0.015 wt% of scale inhibitor, 0.0 1~0.08wt% of drier, and 0-3.5 wt%