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Subject: Photo identification

Photo identification

From: Michael McCormick <ah670>
Date: Tuesday, October 1, 1991
>From: Sue_Bigelow [at] mtsg__ubc__ca
>   1) The entire photograph has a brilliant reddish-orange cast, as
>though the gelatin layer has been dyed this unnatural colour;
>   2) the Museum curator next door swears that this is a "special photo
>process" that he's seen before (but he doesn't know what). He may be
>confused with red autotypes.

Based upon the description, it sounds to me that you may have a photo
heavily toned with Berg Copper Toner, or an equivalent.  Do the borders
show the tone?

If it is indeed copper toner, it is my understanding that it unstable
across the long term.  You would probably be wise to copy it.

Michael McCormick
Western Reserve Historical Society

>From DWNPPH [at] ritvax__isc__rit__edu Sat Oct  5 16:27:28 1991

                  Conservation DistList Instance 5:22
                  Distributed: Sunday, October 6, 1991
                        Message Id: cdl-5-22-001
Received on Tuesday, 1 October, 1991

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