Hi,
I'm new at LF, and I'm interested in reproducing some of the interesting halation effects that were common with some kinds of plate photography. My understanding is that the halos are caused by light reflecting off the back of the film or plate and causing a secondary exposure. I think the amount of spread is greater with glass plates than with film since the material is thicker and lets the light spread out more before it reaches the emulsion. I think the intensity of the secondary exposure must have to do with the reflectiveness of the back surface.

So:
Am I on the right track if I attach x-ray film to the front of ordinary glass, reflective mylar film to the back, and put the sandwich into a plate holder?

And if I am on the right track, I've got a million questions about plate holders, glass, adhesives, etc.

(Also, I won't be offended if someone demonstrates that this is trivial to do in photoshop.)

Will