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YOU SHOULD USE HP 21 BLACK INK CARTRIDGE FOR BLACK PRINTING.IF YOU USE 22 COLOUR CARTRIDGE YOU WILL GET ONLY GREAY PRINTING ONLY.I AM RIGHT?IF YOU USE COLOUR CARTRIDGES MAY YOU WILL GET MONEY LOSE. BECOS IT WILL FINISH EARLY.BLACK INK COST IS LESSTHAN COLOUR INK CARTRIDGES. SO YOU SHOULD BUY BLACK CARTRIDGE FOR REAL BLACK PRINTING.
Hi joyce2020 Some printers do print even if one cartridge is empty. This is what you have to do. Goto the print setting page. you will find check boxes for Print in Color OR Black& White. Usually, the color box is checked. When you check the box for color, you can print in black and white as well provided the text is written in B&W. If you check the B&W, the printer will print everything in black including color text and graphics.
The large black ink cartridge is used for printing text and other general black printing. The small black cartridge is used when printing graphics and other fine details. Each cartridge feeds to a different part of the print head, which is used for different purposes.
It won't default to the small one...I emailed Canon support; this is the response I got.
The reason for the two different black ink tanks is for the different types of printing your unit is capable of.They are not intended as backups to each other.The larger black tank is pigment based, and is primarily used for standard black text printing or output.The smaller black ink tank is dye based like the color inks, and is used for photo and graphics output.They are designed to complement each other, allowing the printer to produce the best possible black text output or photo quality as appropriate.
its ok I solved it! I didn't realise that all the photo cartridge does is gloss over the colour picture produced by the colour cartridge. I simply had to replace the colour cartridge which had run out, so now its all working perfectly!!
On some printers, probably including yours, the black ink will be taken from the reserves in your colour cartridge unless you specifically tell it to do a black and white print on each document, regardless of whether it's printing black exclusively. I wouldn't worry, the black ink in it's own cartridge can also be used for colour photos etc with no detrimental effects.
Have you tried a new colour cartridge? This is a classic sign that the cartridge may be low on ink. When printing text, assuming you are printing black, it is likely that the black cart is doing most of the work so the gaps are insignificant. You could try printing text in several different colours. If the colour cartridge is low, you'll find that some colours may be ok but others may have gaps.