Canon G3470 / G7000 – Intermittent Magenta Halo Around 100% K Black Text on Glossy Printable Vinyl

[Handelief]

I am hoping someone can help explain or reproduce this issue because I have spent considerable time isolating variables before posting.

Equipment

Printers

• Canon G3470
• Canon G7000

Computer

• Windows 11

Software

• CorelDRAW Graphics Suite 2026

Driver

• Canon Driver Version 4.15.3.30

Media Tested

The issue has occurred on multiple brands of glossy printable vinyl, including:

• Maizeys White Glossy PET Printable Vinyl
• Other glossy printable vinyl brands previously used

Because the same behavior occurs on different brands, I do not believe it is media-specific.

Document Setup

• Text remains editable (not converted to curves)
• Object color = CMYK 0 / 0 / 0 / 100
• No outline applied
• Overprint Fill = OFF
• Overprint Outline = OFF
• CorelDRAW print settings:
  • Output Colors = RGB
  • Preserve Pure Black = ON
  • Canon IJ Color Printer Profile 2015
• Printer Media Type = Glossy Photo Paper
• Print Quality = Standard

Description of the Problem

The printer occasionally produces a soft reddish/magenta halo around black script text.

Important observations:

• The black itself remains a deep black.
• Only a soft fuzzy reddish/magenta glow appears around the edges of the letters.
• The halo surrounds the entire word rather than appearing on one side.
• The problem is completely random.

For example:

• Approximately 40 identical pages were printed.
• Around 10 pages printed perfectly.
• Around 30 pages developed the halo.
• There is no pattern relating to the beginning, middle or end of the print run.

The exact same file, printer, media and settings were used throughout.

Additional Testing Performed

The following have all been checked:

• Print head alignment
• Correct CMYK values
• Overprint disabled
• Text remains live text
• Vector outlines appear clean
• Multiple brands of printable vinyl tested
• Same behavior reproduced on both the Canon G3470 and Canon G7000

Important Observation

On the same page there is another text object with the color:

RGB 14,24,36

This text prints perfectly every time with no halo.

Only the CMYK 100% K script text occasionally develops the magenta halo.

Question

Is the Canon G-series driver or firmware using composite black or edge enhancement for K-only vector text when printing on glossy media?

If so:

• Is there any way to force true black-only rendering?
• Is there a driver setting that disables composite black or edge enhancement?
• Is this expected behavior on glossy printable vinyl?

Any technical explanation or recommendations would be greatly appreciated.

[DerrickL]

Number one cause of this is an ink bleed. This occurs when the ink spreads beyond the intended area, causing color mixing. I can also be caused by and alignment issue. If you have done the head alignment and a nozzle check and they both look good, then I suggest an ink bleed. Are you using genuine Canon ink?

[Handelief]

I've done head alignment and nozzle check.  Using genuine Canon ink.  Is it possible to have random ink bleeds as it is not every image that has the hallow effect around it?

[DerrickL]

Yes, it is possible to have random ink bleeds, which can cause a halo effect around printed text. This issue may occur due to factors like paper quality, ink type, or printer setting. I think we can rule out the ink.  

On Canon G7000-series, the paper type setting strongly affects how much ink is laid down and how it behaves on the surface.

• In the printer driver, switch from generic/plain settings to the closest match for glossy/photo/label (wording   varies by driver).
• Turn off any “high color/extra ink” or “economy off” style options that increase saturation if available.

If you’re printing from a design app, also try printing from the OS/driver interface with no extra color effects (no “enhance,” no “color correction” overlays) and see whether the halo changes.

4) Let it dry / avoid immediate handling

Vinyl that’s glossy + inkjet ink can show fringes if the ink hasn’t fully set yet.

• After printing, let it sit flat for a few minutes (longer if humidity is high) before moving or stacking.
• Don’t rub/press the area—halo often worsens when fresh ink is disturbed.

5) If it still halos after magenta nozzle health looks good

If nozzle check for magenta looks fine (clean lines/solid blocks), then it’s more likely a bleed/over-inking issue:

• Reduce “quality” to a mode that lays less ink (sometimes “standard” behaves better than “high” on glossy vinyl).
• Decrease saturation/black intensity in your print settings (less ink = less color encroachment).
• Try a different source file/color (sometimes an ICC/profile mismatch makes blacks “not really black” and instead builds them with CMY, which can create a magenta rim even when the text says blac