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          Color film on the back of the phone
          
                                                                                                
          With the advent of 5G era, due to the problem of signal strength, the back shell of the mobile phone has returned to the plastic material, coated with various gorgeous colors.
          throughput:
          1. Various color films
          2. Coating substrate: PC, PMMA
          3. Insulation resistance ≥ 2000m Ω