PPGI is prepainted galvanized steel, also known as prepainted steel, coil coated steel, color coated steel etc.A galvanized steel sheet in coil form is cleaned, pretreated, applied with various layers of organic coatings which can be paints, vinyl dispersions, or coatings are applied in a continuous process known as Coil steel thus produced in this process is a prepainted, prefinished ready to use material. PPGI is the material which uses galvanized steel as the basic substrate metal. There could be other substrates such as aluminum, Galvalume, stainless steel, etc.