"Living things...are moist. When the electricity enters the living object, it produces an area of gas ionization around the photographed object, assuming moisture is present on the object. This moisture is transferred from the subject to the emulsion surface of the photographic film and causes an alternation of the electric charge pattern on the film.

If a photograph is taken in a vacuum, where no ionized gas is present, no Kirlian image appears.

If the Kirlian image were due to some paranormal fundamental living energy field, it should not disappear in a simple vacuum (Hines 2003)."

bron: http://skepdic.com/kirlian.html

Groeten, Egon