An electrostatic recording control method wherein there are provided a single surface potential sensor between a first and second developer units, a detector for detecting the characteristic of a factor influencing the dark attenuation characteristic of the sensitive body, comprising the steps of: irradiating...http://www.google.com/patents/US5659841?utm_source=gb-gplus-sharePatent US5659841 - Electrostatic recording control method and electrostatic recording apparatus