I've just browsed one of the French files : "Manuel de photochromie interférentielle" by A. BERTHIER puplished in 1895. It confirms the "necessarily dull" aspect of pictures made without mercure reflector; it gives different receipes to make a proper emulsion, how to apply it, how to modify it in order to make it faster without losing the colors. It also hints to some directions for amateurs to experiment and find ways to improve the process (like using 2 different types of emulsions one on top of the other) or using wet collodion. Translating all this is quite a lot of work, I didn't realize that at first. I might need some help depending on how many of those papers needs to be translated. Maybe I'll make a post on the French forum.
Last edited by Lionel1972; 06-14-2010 at 11:59 AM. Click to view previous post history.