Printing with a cyan cast

[Rekusu]

What ho one and all,

I have an old but still, more than useful Cannon Pixma MP640 printer / scanner. Use it mainly to scan to pdf but very, very occasionally, the colour printer is useful.

Not overly concerned about the quality of the inks so I have refills fitted. However, the past X time I have used it and again today, when I was trying to copy a document, there is an overall cyan cast.. The document I was copying is essentially, white paper with printing and images on it but the white paper reproduces with a nice, even overall cast.

Have run all the cleaning options, and the test print, but make no difference. Last time I printed some photos with the printer connected to my computer, tried to tweak the setting to eliminate or reduce the cast, but it made no difference.

Is there any way to get the printer back to the factory settings with no cast. White paper should print with no ink whosoever but that is not happening.

Thanks and toodle pip

Attachment 15973

[Steve R Jones]

I googled-> cyan cast

Cause: A cyan color cast often appears in underwater photography due to the way light travels through water. It can also result from incorrect white balance settings, poor lighting, or issues with color profiles in post-production.

Correction: Use image editing software like Lightroom to adjust the HSL (Hue, Saturation, Luminance) panel and use color calibration to remove the unwanted cyan. In a video or photo editing workflow, you can adjust the tone curve, specifically by pulling down the blue channel and/or pulling up the green channel to counteract the cyan tint.

Prevention: Ensure your camera's white balance matches the light source, use proper lighting, and calibrate your monitor with a hardware kit.

[Steve R Jones]

Also, the document you printed seems to have a lot of cyan in it.... What happens if you print something that is 100% black and white?

[Rekusu]

Thank you; in a former life, I was a photographer and am familiar with colour casts and colour balance. It was so much more complex in the days of film.

Yes, the document does have some cyan, but the background of the scanner is white, certainly not cyan. If the background cyan is not there, the document would be more or less, OK. It is in fact, my passport that I need to submit to a bank for ID proof since when I changed my e-mail address to the current one, their computer decided to lock me out of my account.