Glass deterioration on daguerreian jewelry

Tania Passafiume <tania.passafiume<-a t->bac-lac< . >gc< . >ca> writes

>Does anyone have any experience or references concerning glass
>deterioration on daguerreian jewelry?  This includes what type of
>tapes, if any were originally used as well as sources of
>contemporary glass to replace the deteriorated ones. ...

The borosilicate glass is more durable than normal, but cutting that
glass is not too simple and requires some special tools.  To find a
source, search for "Boroflow".  However to keep original cover glass
(separate from daguerreotype) can be useful for future researchers
as a source.  The sealing tape is usually the nowadays but there are
a few article on the net about experiments with more effective
sealing with e.g. an aluminium-silicone foil sandwich.


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                  Conservation DistList Instance 27:30
                Distributed: Wednesday, January 29, 2014
                       Message Id: cdl-27-30-003
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