Apple ColorLaserWriter 12/600PS - Manual (Page 318)

9 Tap the toner disposal box to settle the toner.
10 Remove the toner disposal box.
11 Put the plug into the opening in the toner disposal box.
The plug prevents loose toner from leaking out of the box.
12 Put the toner disposal box into a resealable plastic bag and seal the bag.
The stopper is stored here.
Pull it loose and use it to
plug the opening.
297 Packing and Moving the Printer