The leading edge is fainter.
Unprinted area on leading edge due to insufficient transfer pressure
Unprinted area due to insufficient transfer current
Unprinted area due to excessive transfer
This is likely to occur if:
When printing in a low temperature environment (unprinted area on leading edge due to insufficient transfer).
When printing in a high temperature environment (unprinted area on leading edge due to excessive transfer).
When using thin paper (unprinted area on leading edge due to transfer current).
When using thick paper (unprinted area on leading edge due to insufficient transfer pressure).