The only proven way to preserver daguerreotype is to seal them behind glass.
Their surface is very fragile (even when gilded), and on top of that silver
oxydizes
in contact with oxygen.
Daguerre and others tried various varnishes, but never found anything
satisfactory.
There are some reports of successful protection by electrolytic coating
(copper?) but
such methods never were widely adopted.
gregory
> -----Original Message-----
> From: Bill William [mailto:iodideshi@yahoo.co.jp]
> Sent: Monday, July 12, 2004 4:52 AM
> To: alt-photo-process-l@sask.usask.ca
> Subject: Ambrotypes, DAGs and TinTypes...
>
>
> Hi... working on a new project now...
>
> I was wondering how Ambrotypes, Dags and Tintypes were
> sufrace protected....
>
> I belive Tintypes were varnished, which I read led (or may
> lead) to intense darkening of the image.
> (Any comments?)
>
> How are the other two processes protected?
>
> Who on the list has had sucess with these two methods?
>
> Who has tried various different methods of surface
> protection ?
>
> What did you find works best?
>
> Ray
>
>
>
> __________________________________________________
> Do You Yahoo!?
> http://bb.yahoo.co.jp/
>
>
Received on Mon Jul 12 19:42:14 2004
This archive was generated by hypermail 2.1.8 : 08/13/04-09:01:11 AM Z CST