PPGI steel is produced based on galvanized steel or galvanum steel or cold rolled steel.The base metal(GI,GL OR CRC) steel should be cleaned firstly.it's included surface chemical-degreasing and chemical-conversion treatment.After cleaned,organic painting material will be coated.the organic material can be PE,PVDF,HDP,or SMP.this coating process is very important.it's the most important for PPGI's color,include bright intensity.Baking will be after every coating when process.paint material will be solidified and stable after baking.Once temperature is come back to normal style,a fresh steel---prepainted galvanized steel is formaed.PPGL has double protection.one is galvanized steel or galvanumed steel,another is color coating material.the last coveres and protectes steel,it's a very good for preventing rust.Also it makes steel's good life time increase by 1.5 times.Products namePPGL,prepainted galvalume steel coilapplicationthickness0.18-2.5mmSteel coil has three layers of packing.Kraft paper is in inside.Water plastic film is in the middle.Galvanized steel sheet is covered outside.All of three are tied by steel strips with lock.width1000mm/1250mmweight4MTRoll diameter508mm/610mmmaterialSGCC, CCC, DX51D+AZfilm thickness17-25um/ 5-25umcolorIvory, lime, sky blue, sea blue, titanium white, or according to your requirementhardnessH, HB,  2Bbrightnessgeneral:70AdvantageWith no pollution, excellent weather resistance, corrosion resistance, high processing characteristics etc.problemsNatural aging and artificial aging, bubble, shrink hole, leakage coating, loss of light, discoloration, powder, foaming, cracking, peeling, rust