Print in Grayscale
Selecting the Print in Grayscale option from the printer driver prints a document in black and white. This option is useful for printing color documents that will be photocopied or faxed.
When Print in Grayscale is selected, the printer goes into monochrome mode (regardless of what the COLOR/BLACK MIX setting is). This mode will reduce wear on the color cartridges.
HP 3550 3700 Print in Grayscale