Photographing fingertips using the film plate


Plug jumper in from the red high voltage output jack to the red plate jack.

Insert a new pack of film into your own Polaroid one-step camera. The cardboard protective sheet will eject from the camera.

IN TOTAL DARKNESS or in a large film changing bag, remove the pack of film from your Polaroid camera and place it on the CV5000 plate as shown.

Plug the end of the ground wire into the BLACK grounding jack on top of the unit next to the jumper. Clip the alligator clip on the wire to the end of the copper grounding probe. Have the subject hold on tightly to this metal grounding probe


Place fingertips on film. Push and hold button for duration of desired exposure time. For additional power for large subjects, you may "pulse" the button by pressing it and releasing it repeatedly. A momentary pulse of up to three seconds is sufficient in most cases. You should be able to see a bluish light and hear a slight hissing sound coming from under your fingertips. If not, then you will probably not get an image. Make sure the subjects hands are clean and DRY.

After taking the image, re-insert the film pack into your Polaroid camera and the film will eject and develop.
Once the film ejects, you can turn the lights back on. Keep the film pack in your Polaroid camera until you use it again.

 HELPFUL TIPS FOR TAKING IMAGES OF FINGERTIPS:

You may use a low powered UV or "black light" or a tiny red light to help you see in a darkroom. But the light must be placed as far away as practicable and should be positioned **lower** than the camera stage. This light must be very dim, otherwise it will fog the film. Keep the film covered with a dark light proof material like a black cloth until you are ready to expose it.

The brightness of the image depends upon how much surface area of the fingertips is exposed to the plate, and how long the exposure time is. The more area exposed, the dimmer the image will become.  If just the very tips of the fingers are exposed to the plate, you should get a very bright discharge so you should only push the button for a second or so. Large fingers need more exposure time.

For better consistency, make sure fingers being photographed is clean and DRY. If the fingers become sweaty or have hand lotion on them, the image brightness will be reduced.

The amount of pressure the subject puts on the plate also affects brightness. When photographing fingers for instance, the fingers should be held very lightly against the plate.

Make sure that your ground cable is connected to the metal grounding probe and held tightly by the subject for enhanced performance. Without this, the brightness of the image will be greatly reduced.