... base metals for Ral Color Coated PPGI consist of cold-rolled, HDG electro-galvanized and hot-dip Alu- ... zinc coated. The finish coats of Ral Color Coated PPGI can ... -coating-and-three-baking. The Ral Color Coated PPGI has a very wide selection, like orange, cream ... , porcelain blue, etc. The Ral Color Coated PPGI can also be classified into groups by their surface ...