Once you have completed your InDesign document follow these steps to print in grayscale, without getting a brown color cast on your images:

1. Go to File, then hit Save as .indd. Choose a file name and location to save to.
2. Go to File - Print. Under Printer, choose spopresscolor (located on 2nd floor of Spori) or CopySpot1 printer (located on the 1st floor of the library).
3. Choose Output from the left side of the print window.
4. Under Color, choose Composite Gray.
5. Proceed with printing.