Cause:
This is caused by condensation.
The following are possible causes.
• Since the printed surface is impervious to moisture, a lot of water vapor is generated from the
opposite side (back of the paper).
• Condensation is formed at the pressure roller separation pawls downstream of the fusing unit.
• Condensation forms water droplets that adhere to the pressure roller downstream of the fusing unit.
• With the pressure roller rotating halfway around, the water droplets are carried to the fusing nip
entrance.
• The water droplets are retained by the wiper effect of the nip.
• As the leading edge of the next sheet of paper enters the fusing nip, the unfused image is disturbed
by the water droplets.
Occurrence conditions:
• When printing on cast-coated paper
• When paper is stored in a humid environment
• When the printer has been in standby mode for more than 20 minutes
Solution:
• Do not store paper in a humid environment.
• Store paper in moisture-proof packaging.
• Increase the fusing temperature
The higher you increase the fusing temperature, the more likely it is that solid-fill images are
troubled by orange peel (uneven toner density). Increase the temperature in steps of 10 °C while
4. Image Quality Problem: Full Page
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