Opalotype

mentzer@bedford.progress.com
Mon, 02 May 94 12:57:00 PDT

Wondering if anyone has heard the term Opalotype.

I picked up a photograph over the weekend and it had a description (early)
explaining it was an Opalotype. It goes on to explain that it is made by
coating a piece of opal glass with a gelatino-bromide emulsion. The
picture itself has a red tint to it, andd is faint.

Also wondering if anyone has any suggestions for cleaning the piece of
glass - I do not want to disturb the print.

Has anyone seen these before (I would guess it's done right around 1880 -
1900)? Any ideas on value? (It's not in great shape - faded and stained).

Thanks, Kevin
mentzer@bedford.progress.com