High Performance Polymers, 2nd Edition

1: CARBAZOLE POLYMERS 11

the imaging layer in the dark and then exposing this

electrostatically charged surface to a light and shadow

image.

The light-struck areas of the imaging layer are then

rendered conductive and the electrostatic charge is

selectively dissipated in these irradiated areas. After

the photoconductor is exposed, the latent electrostatic

image on this image-bearing surface is made visible

by development with a finely divided colored elec-

troscopic material, i.e., the toner. The toner will be

attracted to those areas on the image-bearing surface

that retain the electrostatic charge and thus form a vis-

ible powder image.

The developed image can then be permanently fixed

to the photoconductor where the imaging layer is not

to be reused. In ...