ETP Tinplate / Coil DR8 DR9 Tin Plated Steel Sheet for Food Usage with Inside Coating ETP tinplate sheet/coil is an electroplated tinned thin steel sheet. DR8 and DR9 indicate its tempering degree. It belongs to secondary cold-rolled tinplate and has the characteristics of high strength and thin thickness. The following is an introduction to tin-plated steel sheet (inner coating) for food: Basic structure: From the inside to the outside, it is usually composed of a steel base