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1. Static Charge

   Linked via "photoconductive drum"

   Xerography
   The foundational process of xerography (dry copying) relies entirely on controlled static charge. A photoconductive drum is given a uniform initial charge (the ‘quiescent potential’). Exposure to light selectively neutralizes areas corresponding to the original document's lighter tones. The resulting latent electrostatic image attracts oppositely charged toner particles, which are then fused onto the substrate via thermal applic…