Hummm... the answer to another question posed in private again answered in public... I sense a pattern evolving. Oh well, Two of my attempts having been thus far thwarted, I guess I will give up further attempts at "private communciaton". So... here we go public: I do appreciate the detailed description of the screens- I don't think many photographers ever really grasp how those plates are made... I know your description was refreshing for me- to say the least. I don't really grasp the physics behind why the diameter of images are related to the intensty of the light, unless it involves light "bleed"... but anyway it is a fascnating aspect of photography that I wish I could have had a demonstration of way back when I frst began learning about photography, or even later, in college, but that is something that I missed... even today, I have attended conferences where electronic paper was being discussed and, naturally, no one had any samples! On the other hand, I have seen some very fine present day collotypes. BTW, I am curious... is Jean-David Beyer a male or a female? Please note that unlke the links you provided concering your relatives, I am not asking about sexual orentation... (I don't even know how they presume to discern such information, but oh well...) Does the hyphen indicate marriage or was it a given name? Ray ------------------------------------- On Mon, 10/19/09, Jean-David Beyer <jeandavid8@xxxxxxxxxxx> wrote: > As I said in the private e-mail.... ============================================================================================================= To unsubscribe from this list, go to www.freelists.org and logon to your account (the same e-mail address and password you set-up when you subscribed,) and unsubscribe from there.