Heliochromes (Lippmann process)
Jim Browning (james.browning@valley.net)
Sat, 2 Nov 1996 22:00:57 -0500 (EST)
Has anyone ever made a Lippmann process Heliochrome? I have been studying
this technique for some time now - mostly from old books from the turn of
the century. The process uses a very fine grain emulsion, with a mirror
backing. The emulsion is exposed by light which bounces off of the backing
mirror, setting up an interference pattern inside the emulsion. The plate
is then developed, and the image is reconstructed by shining white light at
the plate, which reconstructs the exact spectral image, not just a
tri-color approximation, but the actual spectrum of the original image.
I'm planning on trying this sometime before I die - just wondering if anyone
has made a Heliochrome in the last 80 years or so. - Jim
james.browning@valley.net