There has been quite a bit of debate about the image formation process. The method I favor is a natural amino/carbonyl reaction called a Maillard Reaction. Ray Rogers suggested it and championed it until his death in early 2005. The problem with his hypothesis, then and still, is trying to figure out how such a formation process would result in the high resolution of the image. This morning I was reminded of three short sentences he once wrote in an email:
You can argue all you want about resolution. The Maillard colors are somewhere on that cloth. Where do you think?
Something to think about.