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Old 08-21-2018, 01:52 PM   #1
farside268
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Printing non-text with Canon UFR II has pixelated background


I have had this problem for a number of years. When I print anything that isn't strictly text (images, documents with letterhead, etc), the printer seems to treat the transparent background as non-white and adds very subtle pixelation. The dots are visible on the printed document. The printer is a Canon Imageclass D1150, and the driver is Canon's UFR II. I've tried every version that has come out over the years with no improvement.

If I set "toner save" to "yes" the pixels are fainter, but they're still visible.
 
Old 08-21-2018, 02:28 PM   #2
ferrari
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I wonder if your laser printer has a hardware problem rather than a driver-related issue here. The symptoms read a bit like this...

https://www.printertechs.com/printer...ground-scatter
 
Old 08-21-2018, 02:47 PM   #3
farside268
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Quote:
Originally Posted by ferrari View Post
I wonder if your laser printer has a hardware problem rather than a driver-related issue here. The symptoms read a bit like this...

https://www.printertechs.com/printer...ground-scatter
It's definitely software. The pattern doesn't appear if I print from VBox running Windows, and the pattern is clearly deliberate. It's consistent and symmetrical all over the sheet.
 
Old 08-21-2018, 05:33 PM   #4
ferrari
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Strange. It would be interesting to know if others using the UFRII driver are impacted similarly. Do you observe the same if printing a CUPS test page? Does this happen when printing from all applications?

Unlikely to help, but it might be worth checking print options perhaps (eg media settings)
Code:
lpoptions -l <name_of_priner>

Last edited by ferrari; 08-21-2018 at 05:34 PM.
 
Old 08-22-2018, 03:00 PM   #5
farside268
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I have the same problem with my home laser printer that also uses UFR II. The output of lpotions -l is:

Resolution/Resolution : *600
CNTonerSaving/Toner Save : Auto True *False
MediaType/Media Type : *Auto PlainPaper PlainPaperL HEAVY ThickPaperH OHP ENVELOPE
InputSlot/Paper Source: *Auto
OutputBin/Paper Destination: *Auto
CNSpecialPrintMode/Special Print Adjustment: False *Mode1 Mode2
Duplex/Duplex: *None DuplexNoTumble DuplexTumble
BindEdge/BindingEdge: *Left Top
Collate/Collate: *False Group
CNImageRefinement/Image Refinement: *True False
CNHalftone/Halftones : Resolution *Gradation ColorTone
PageSize/Page Size: *Letter Legal Executive A5 B5 A4 Monarch Com10 dl_envelope Envelope_C5
 
Old 08-22-2018, 03:24 PM   #6
ferrari
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Does changing 'CNSpecialPrintMode/Special Print Adjustment' or 'CNHalftone/Halftones' make any difference?
 
Old 08-22-2018, 04:20 PM   #7
farside268
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I tried all the special setting and halftone options.
 
Old 08-22-2018, 04:57 PM   #8
ferrari
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Can you also answer the questions asked in post #4
 
Old 08-22-2018, 04:59 PM   #9
farside268
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The same thing happens with a test page. It happens when printing from any application that uses CUPS
 
Old 08-22-2018, 05:32 PM   #10
ferrari
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Ok, thanks for the update. I'm out of ideas with this - other than to contact Canon with a bug report.
 
  


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