Making Ghost-like Images - (Negative Film method)

1. Put your camera f/stop  (aperture) on f/8
2. Turn the shutter speed dial to “B”
3. Attach a cable release to the cable release socket on your camera.
4. Mount your camera onto a tripod.
5. With the room lights on, focus on your subject.
6. Turn the room lights off.
7. Press the cable release and lock it open.
8. Use a flashlight as your light source.  Turn the flashlight on and point it at your subject.  Keep it on for about 10 seconds.
9. Turn your flashlight off and have your subject move to the second “ghostly” position (take a step to one side.)
10. Turn the flashlight on again for about 10 seconds and then turn it off.
11. (Each time you turn the flashlight on you change the silver particles on your film and create a partial image.  If you turn the flashlight on three times, you form three “ghost” images on your print.)
12. The final stage is to create a background image.  This is the tricky part because you need enough light energy to make the scene at least twice as intense (solid looking) as any of the “ghosts” but if you give the room background too much light energy the ghosts will disappear entirely.  Just flipping on the  room’s light switch up and down (leaving the lights on for only a fraction of a second) usually works pretty well.  For outdoor scenes you might try flipping a car's headlights on & off again instead of room lights.
13. After you have added the room exposure to the ghost exposures (with the room now dark again) go back to the camera and unlock the cable release to close the shutter and complete that frame. 
14. Press the film advance lever to advance to the next frame & get ready to take the next photo.
15. For best results you should bracket your exposures by repeating the steps above using slightly different times.  (12 seconds or 14 seconds instead of ten seconds for each ghost image and quicker or slower flashes of the room’s lights.)