Hey there!
First, I need to clarify that, obviously, Canon doesn't officially support using third-party inks in our printers. I'm not saying you can't. I'm saying we don't support it.
Now that's out of the way, inkjet printers typically print using the pigment black ink when they print text. (Think anything from any kind of office software like Word, Excel, or like that). That's because the text needs to be super clear. When you print images, the printer uses dye-based color ink to make them black.
In your situation, the way around this would be to print your images in grayscale—that will force the printer to use the black ink tank only. Learn about that here.
