Apple Color StyleWriter 1500 - Manual (Page 55)

Storing the ink cartridge you aren’t using
The Color StyleWriter 1500 comes with two ink cartridges, a color cartridge
and a black cartridge. While they are sealed in their original packaging, the
ink cartridges are protected. If you open both packages and switch ink
cartridges for printing different documents, be sure to store the one you’re not
using in the storage case supplied with your Color StyleWriter 1500. The
storage case keeps the print head from drying out and prevents accidents with
ink stains.
Once you’ve removed both cartridges from their original packages, always
keep one inside the printer and the other in the storage case.
Be careful not to touch this area on the ink
cartridge, or you may stain your fingers with ink.
55 Maintaining Your Printer