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2. Printing Process

Development

The development system employs the dual-component

The developer is pre-mixed

developer that occurs over time.

Electrostatic latent image areas of the drum attract negatively charged toner particles from the

development roller [1].

To maintain consistent amount of toner attraction from the development roller [1] to the drum [2] for

stable image quality(toner density), image quality adjustment process runs automatically when turning

on the machine power and at optimum timings.

*1 The developer consists of positively charged carrier (+) and negatively charged toner (-).

*2 The carrier is pre-mixed with the toner in the toner bottle and the mixture is supplied to the development unit to

constantly refresh old developer in the development unit with new developer.

During the image quality adjustment process, toner patterns in 10 gradients are created on the ITB for

each toner color, which are read by the toner mark sensors. Xerographic conditions are adjusted

according to the sensor readings, maintaining consistent development (maximum image density).

to prevent image quality degradation caused by deterioration of the

DZH301

[A]

DZH302

development method.