... Roof tile Bicycle, Textile,Building Material, Stationery, etc.Spray Coating, Powder Coating, Electrostatic Coating, Blade Coating, Screen Printing, Knife Coating, Roll ... Printing, Screen Printing, Offset Printing, Knife Coating, Roll Coating, Air knife Coating, etc.Cosmetic industrial:ProcessingEye ... According to different thichkness of this Iron Oxide layer, intererence color like bronze, brown, red, ...