printing - How to print in black and white when a color ink cartridge is out of ink

I'm getting the following error message in HP Photosmart C7200 series print dialog:

The printer is out of ink.

The following ink cartridges are empty: Magenta. Replace these ink cartridges to resume printing.

How can I make it print with the black and white cartridge only?

Mac OSX 10.7.3
HP Photosmart C7280 (7200 series)

Answer

This has become a popular post so I'm copying over the answer from the official HP forums rather than linking to it.

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Hi,

Unfortunately it is not possible to print using the black and white while any of the ink cartridges are empty.

Using the Black ink only possible while there is color ink as well.

While the color ink is not required for prinitng purposes, it do required for ,maintnance operations of the device.

As the device contain an internal printhead (IIC system), lack of color ink will damage the printing system shortly. Therefore the device will not be functional when there is no ink in order to avoid damaging the system.

For users who wish to print using just black ink (despite the reduced print quality), many HP printers offer options. For example, a driver colour setting (by selecting "print in greyscale with the black cartridge only" in printing preferences) specifies printing using only black ink. In addition, many IPH printers can operate in "reserve mode", which allows the user to continue to print with just the black cartridge when the colour cartridge is removed or not installed.In HP IIC systems, all supplies are required to be installed in the printer for the printer to function

Source

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HP forum post