PPGI is pre-painted galvanized steel, also known as pre-coated steel, color coated steel etc.
Using Hot Dip Galvanized Steel Coil as the substrate, PPGI is made by first going through surface pretreatment, then the coating
of one or more layers of liquid coating by roll coating, and finally baking and cooling. The coatings used including polyester,
silicon modified polyester, high-durability, corrosion-resistance and formability.