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Consumer Electronics by S. P. Bali

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CHAPTER 45

XEROGRAPHY

The successful, commercial exploitation of xerography has resulted from the integration of a number of electrostatic process steps. The creation of an electrostatic image, which allows development by charged, pigmented particles, forms the basis of the xerographic process. These particles can then be transferred to plain paper and subsequently fixed to provide a permanent copy. The generation of the electrostatic image in all xerographic copiers depends upon the phenomenon of photoconductivity, whereby a material's electrical conductivity will increase by many orders of magnitude under the influence of light. By initially charging the photoconductor to a high, uniform surface potential, light reflected from the background ...

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