Acceptance
The toner is actually a black coloured thermoplastic which, on being heated, melts and impregnates the paper. In other copiers, a chemical spray dissolves the toner so that it can impregnate the paper. Finally, the photoconductor plate is cleaned and ready to be recharged for the next cycle.
Machines in which the toner is wafted on, tend to deposit it at the edge of the charged regions so that large black areas are reproduced as black edges with white centres. The brushing method produces a more uniform toner deposition and thus reproduces large black areas more uniformly.