[quote="Annie"]OK just one more posting.......

Here is a link that is interesting because it mentions that one of the toned prints in the study as revealed by the analysis was in fact 100% platinum.... (actually the entire article is interesting)

Annie,

Thanks for the link. Very interesting article.

However, my reading of the article is different from yours, at least if I am understanding what you wrote above. When the articles states, "In addition to the silver image, three of the images analyzed revealed the presence of gold only; four showed a combination of gold and platinum; one had platinum only." I took that to mean that all eight prints contained silver, of which three contained also gold, four contained also gold and platinum, and one also only platinum.