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Re: Printer spews black ink - especially on duplex
Hi again - ref our live chat just to let you know i got the thread - manual link below;
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Try this: take a small, sharp knife and make sure the air slit on the top of the cartridge goes all the way through the plastic.
You know that little tab you have pull off the top of the cartridge before inserting in the print head? There is a tiny slit under the tabto let air in, which is necessary to let the ink flow out. The slit is made very small so ink won't leak inadvertently out the top. Sometimes the slit doesn't go all the way through the plastic. When that happens, the ink can't flow.
I blew through that slit on a defective cartridge and no ink came out. I used a pen knife to open the slit (it doesn't take much) and then blew again. This time ink spewed out the bottom. My print test showed the black ink coming through. It was a bit spotty so I cleaned the print head and now the black ink comes out just like its supposed to.
Sorry, steve, that you are experiencing this problem.
According to canon.com's website regarding the i9900 InkJet Photo Printer:
Why color ink may be used when printing in black and white
Even when printing in black and white, color ink is used for the following reasons:
Automatic cleaning of the print head.
To prevent the print head nozzles from clogging, the print head is automatically cleaned periodically. At that time, a small amount of each color ink is consumed.
Therefore, although printing in black and white is performed, color ink is also consumed.
Color inks may be used to create black.
When printing in grayscale or on photo paper or when duplex printing, although printing appears in black and white, the color black may be created using the three (cyan, magenta, and yellow) color inks. Printers without a pigment black tank / cartridge will print black / grayscale will create a composite black using color ink even on plain paper.
Therefore, although printing in black and white is performed, color ink may be consumed.
In order to keep the heavy black ink from smearing on the page or in the printer, color ink is used when duplex printing to help create black text.
I might suggest taking out the color ink cartridges leaving only black there, but some printers don't take kindly to this. So, you may have to further experiment with magenta, cyan, and yellow to make it at least seem b&w to your best eye's judgment.
whenever you print greyscale what actually happen is that the printer mixes the red, blue and yellow to give the output in gray scale. See if you mix red, blue and yellow ink in the right proportion it gives you very close to black. just try to print your greyscale with your black ink finished you will still get the same print quality as when the black has ink in it. Or find a way seal the nuzzle of the black in and print your greyscale. check what results.
Are your settings for media type and media weight are correct. Remember different paper, different settings. Make sure your feed rollers are not worn, if worn replace them. A lot of paper jams are caused by miss-feeding, due to worn feed rollers(try cleaning them with alcohol).
Have you tried Canons FAQ? They suggest checking the grayscale box, which apparently only works with certain kinds of printing (duplexing and borderless will still use colors). I don't understand how colored inks are used to create black, but that's what they claim. Anyway, here's the link: http://www.usa.canon.com/consumer/controller?act=ModelInfoAct&tabact=SupportDetailTabAct&fcategoryid=257&modelid=11641