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User GuidePro C7500/C7500H

Uneven Glossiness on Side 2 (Back of the Paper)

Uneven glossiness appears on side 2 in duplex printing.

illustration of Uneven Gloss: Side 2

Cause:

Due to the paper curl happening during the feeding of Side 1 (front), the paper is lifted, and when Side 2 (back) enters the fusing nip, the trailing edge of the paper comes into contact with the fusing belt, resulting in uneven glossiness.

Occurrence conditions:

  • When printing on thin coated paper with a thickness

  • When using paper containing moisture in a hot and humid environment

Solution:

1If the paper is not registered as custom paper, register the brand of the paper.

2If there is room to reduce the print speed (from "High" or from "Middle"), and if the reduced throughput does not cause a problem, go to the next step.

Otherwise, perform the procedure from Step 5 in "(b) Changing the fusing temperature (If [Print Speed] is set to [Low])".

3In [Detailed settings] for the custom paper you are using, select 1231: [Print Speed], and then decrease the value in the following corresponding settings by one level.

Productivity Priority

  • 1231-01: Print Speed: BW/FC/FCS: BW/FC/FCS

  • 1231-02: Print Speed: FCS: Clear/Special

  • 1231-03: Print Speed: FCS: White

  • 1231-04: Print Speed: FCS: Metallic

  • 1231-06: Print Speed: S: Clear/Special

  • 1231-07: Print Speed: S: White

  • 1231-08: Print Speed: S: Metallic

High Quality

  • 1231-10: Print Speed: BW/FC/FCS: Fuser Setting HQ: BW/FC/FCS

  • 1231-11: Print Speed: FCS: Fuser Setting HQ: Clear/Special

  • 1231-12: Print Speed: FCS: Fuser Setting HQ: White

  • 1231-13: Print Speed: FCS: Fuser Setting HQ: Metallic

  • 1231-15: Print Speed: S: Fuser Setting HQ: Clear/Special

  • 1231-16: Print Speed: S: Fuser Setting HQ: White

  • 1231-17: Print Speed: S: Fuser Setting HQ: Metallic

If the present value is [High], select [Middle]. If it is [Middle], select [Low].

When decreasing the print speed to [Middle]

Proceed to "(a) Changing the fusing temperature (If [Print Speed] is set to [Middle])".

When decreasing the print speed to [Low]

Proceed to "(b) Changing the fusing temperature (If [Print Speed] is set to [Low])".

(a) Changing the fusing temperature (If [Print Speed] is set to [Middle])

1Select 1232: [Fusing Temperature], and then decrease the value in the following corresponding settings by 5°C.

Productivity Priority

  • 1232-01: Fusing Temperature: BW/FC/FCS: Heat Roller Temp

  • 1232-06: Fusing Temperature: FCS: Heat Roller Temp: Clear/Special

  • 1232-07: Fusing Temperature: FCS: Heat Roller Temp: White

  • 1232-08: Fusing Temperature: FCS: Heat Roller Temp: Metallic

  • 1232-26: Fusing Temperature: S: Heat Roller Temp: Clear/Special

  • 1232-27: Fusing Temperature: S: Heat Roller Temp: White

  • 1232-28: Fusing Temperature: S: Heat Roller Temp: Metallic

High Quality

  • 1232-46: Fusing Temperature: BW/FC/FCS: Fuser Setting HQ: Heat Roller Temp

  • 1232-51: Fusing Temperature: FCS: Fuser Setting HQ: Heat Roller Temp: Clear/Special

  • 1232-52: Fusing Temperature: FCS: Fuser Setting HQ: Heat Roller Temp: White

  • 1232-53: Fusing Temperature: FCS: Fuser Setting HQ: Heat Roller Temp: Metallic

  • 1232-71: Fusing Temperature: S: Fuser Setting HQ: Heat Roller Temp: Clear/Special

  • 1232-72: Fusing Temperature: S: Fuser Setting HQ: Heat Roller Temp: White

  • 1232-73: Fusing Temperature: S: Fuser Setting HQ: Heat Roller Temp: Metallic

2Print 10 or more A3 sheets. Has the problem been resolved?

Yes

Go to the next step.

No

Start over from Step 1.

3Is the toner fusibility within the permissible range?

Note

  • The required level of fusibility is as follows.

    • The printed image does not come off.

    • The toner does not come off even if it is lightly rubbed by a nail.

    • The toner does not come off even if it is rubbed by the cloth for cleaning the contact glass.

Yes

Finished!

No

Change the print speed to "Low". Go to "(b) Changing the fusing temperature (If [Print Speed] is set to [Low])".

(b) Changing the fusing temperature (If [Print Speed] is set to [Low])

1Select 1232: [Fusing Temperature], and then decrease the value in the following corresponding settings by 20°C.

2Set the value in the following corresponding settings to 0°C.

Productivity Priority

  • 1232-02: Fusing Temperature: BW/FC/FCS: Correct Temp: Initial Feed

  • 1232-10: Fusing Temperature: FCS: Correct Temp: Initial Feed: Clear/Special

  • 1232-11: Fusing Temperature: FCS: Correct Temp: Initial Feed: White

  • 1232-12: Fusing Temperature: FCS: Correct Temp: Initial Feed: Metallic

  • 1232-30: Fusing Temperature: S: Correct Temp: Initial Feed: Clear/Special

  • 1232-31: Fusing Temperature: S: Correct Temp: Initial Feed: White

  • 1232-32: Fusing Temperature: S: Correct Temp: Initial Feed: Metallic

High Quality

  • 1232-47: Fusing Temperature: BW/FC/FCS: Fuser Setting HQ: Correct Temp: Initial Feed

  • 1232-55: Fusing Temperature: FCS: Fuser Setting HQ: Correct Temp: Initial Feed: Clear/Special

  • 1232-56: Fusing Temperature: FCS: Fuser Setting HQ: Correct Temp: Initial Feed: White

  • 1232-57: Fusing Temperature: FCS: Fuser Setting HQ: Correct Temp: Initial Feed: Metallic

  • 1232-75: Fusing Temperature: S: Fuser Setting HQ: Correct Temp: Initial Feed: Clear/Special

  • 1232-76: Fusing Temperature: S: Fuser Setting HQ: Correct Temp: Initial Feed: White

  • 1232-77: Fusing Temperature: S: Fuser Setting HQ: Correct Temp: Initial Feed: Metallic

3Set the value in the following corresponding settings to 5°C.

Productivity Priority

  • 1232-03: Fusing Temperature: BW/FC/FCS: Correct Temp: Pre-Feed

  • 1232-14: Fusing Temperature: FCS: Correct Temp: Pre-Feed: Clear/Special

  • 1232-15: Fusing Temperature: FCS: Correct Temp: Pre-Feed: White

  • 1232-16: Fusing Temperature: FCS: Correct Temp: Pre-Feed: Metallic

  • 1232-34: Fusing Temperature: S: Correct Temp: Pre-Feed: Clear/Special

  • 1232-35: Fusing Temperature: S: Correct Temp: Pre-Feed: White

  • 1232-36: Fusing Temperature: S: Correct Temp: Pre-Feed: Metallic

High Quality

  • 1232-48: Fusing Temperature: BW/FC/FCS: Fuser Setting HQ: Correct Temp: Pre-Feed

  • 1232-59: Fusing Temperature: FCS: Fuser Setting HQ: Correct Temp: Pre-Feed: Clear/Special

  • 1232-60: Fusing Temperature: FCS: Fuser Setting HQ: Correct Temp: Pre-Feed: White

  • 1232-61: Fusing Temperature: FCS: Fuser Setting HQ: Correct Temp: Pre-Feed: Metallic

  • 1232-79: Fusing Temperature: S: Fuser Setting HQ: Correct Temp: Pre-Feed: Clear/Special

  • 1232-80: Fusing Temperature: S: Fuser Setting HQ: Correct Temp: Pre-Feed: White

  • 1232-81: Fusing Temperature: S: Fuser Setting HQ: Correct Temp: Pre-Feed: Metallic

4Print 10 or more A3 sheets. Has the problem been resolved?

Yes

Proceed to Step 7.

No

Go to the next step.

5Go back to 1232: [Fusing Temperature] and decrease the fusing heat roller's temperature by 5°C.

6Print 10 or more A3 sheets. Has the problem been resolved?

Yes

Proceed to Step 7.

No

Start over from Step 5.

7Is the toner fusibility within the permissible range?

Note

  • The required level of fusibility is as follows.

    • The printed image does not come off.

    • The toner does not come off even if it is lightly rubbed by a nail.

    • The toner does not come off even if it is rubbed by the cloth for cleaning the contact glass.

Yes

Finished!

No

No further improvement is likely.

Note

  • Select "Clear/Special" when using Neon Yellow, Neon Pink, or Invisible Red. Select "Metallic" when using Gold or Silver.

  • After performing the solution, it is recommended to perform the color calibration of the external printer controller.