Don't know of any 200 year old photographs either colour or B&W, mainly
cause photography wasn't invented until the 1840's. But there are
colour prints that are 100 years old and still looking good. Look up
"Carbro Process" and "Autochrome."

The Autochrome process produced prints before 1910 that are still
vibrant today.

http://www.institut-lumiere.org/engl...utochrome.html
http://toosvanholstein.nl/greatwar/kleur/kleur.html

Of course, for truly archival colour photography today one can take the
camera original and from it create tri-colour separation B&W
gelatin-silver negatives on glass plates processed and stored
archivally. There are a number of top-ticket professional labs and
museums that do exactly that.


"Rafe B." wrote in message
...
On Sat, 27 Dec 2003 00:08:36 -0700, Tom Phillips
....snip...

May not outlast silver and gelatin, but with care can
eaisily outlast most conventional color photogrraphic
prints. So where are the 200 year old color photograhic
prints and where can I see them?



rafe b.
http://www.terrapinphoto.com