So, over the weekend I finally shot and developed a plate. I've got photos that I will post this evening, and although I haven't been able to successfully view interference colors, the whole thing is nonetheless fascinating and quite unlike any other silver-halide film I've ever dealt with.

It was late last night, so it's possible that diffuse sky-light will aid in seeing the colors.

One thought that helped to reinvigorate my interest in interference "heliochromy" was learning about first (or front) surface mirrors. http://en.wikipedia.org/wiki/First_surface_mirror

You can buy these mirrors for reasonable prices (http://howardglassco.thomasnet.com/v...bc=100|3001011) and you can actually make them yourself quite easily from a cheap mirror.

It seems to me that if you coated these plates with a Lippmann emulsion, all conditions of "optical contact" between mirror & emulsion would be met.

Now, the thing that has me wondering is whether or not you can just leave the emulsion on the mirror during processing & for viewing. There seems to be some disagreement, or at least a lack of clear concensus on this.

J.S. Friedman in the History of Color Photography clearly states that the mirror must be present for viewing, and that this is of course difficult with mercury. However, people here on APUG have seen Lippmanns where their very own eyes, and with no reflector present. Furthermore, an old post on the holo-wiki archive has a discussion wherein FSM's are mentioned, but people seem to be saying that the emulsion needs to be removed from this for viewing.

So who the heck knows?!

Let's try to figure this out... because this seems like a home-run technique for modern day Lippmann photography.