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Top Page > Image Quality Problem: Full Page > Uneven Density > Low Image Density of Black Area > Cause

Cause

Compared to color toner, Bk toner has a lower transfer charge. Therefore, low image density is caused by excessive transfer at the PTR unit.

This is likely to occur if:

  • Printing in the high temperature and high humidity condition

  • Printing in FC mode or FCS mode (These modes have a higher paper transfer current than B/W mode.)