Precision Electrolytic Tin Plate Sheets for Food-Grade Tin Lids - Custom Sizes & Coatings Electrolytic Tin Plate (ETP) and Tin Free Steel (TFS) are advanced materials engineered for manufacturing high-performance food tin lids and caps. ETP features a pure electrolytic tin coating, offering exceptional corrosion resistance, solderability, and a brilliant metallic finish, while TFS utilizes a chromium coating for superior paint adhesion and sulfide resistance. These materials