From: roger.kockaerts (roger.kockaerts@chello.be)
Date: 02/03/00-11:13:03 AM Z
Hello Jack,
Since your daguerretype is deteriorating around the edges, the isolation
around its perimeter seems defective. Before reassembling after your
photographs, take care to isolate the glas-dag sandwich with, for example,
Filmoplast P90 which you may wax on the outside to ensure complete
isolation. The cover glass should only be changed if it is severely
corroded. Also see: Barger S. & White M.S. - The Daguerreotype: 19th Century
Technology & Modern Science, Smithsonian Press, 1990.
Good luck,
Roger
P.S. Did you fix an approximate date for your show in Brussels? Cheers
Roger Kockaerts
Permadocument - pH7
Avenue de la Jonction 55
1190 Bruxelles
T: 32-2-3476676
You are welcome to visit our homepage at: <home.tvd.be/cr25588/pH7/>
----------
>De : Wayde Allen <wallen@boulder.nist.gov>
>À : alt-photo-process-l@skyway.usask.ca
>Objet : Re: Dag info needed
>Date : Jeu 3 fév 2000 17:49
>
> On Thu, 3 Feb 2000, Richard Morris wrote:
>
>> If the subject died 1839 it is very early and therefore not gold toned.
>> Even a hair across the image will remove the mercury. Don't even attempt to
>> clean it as even the usual methods are a bit suspect now. Unless the case
>> is very badly damaged don't even take it out. At least make a photo first!!
>>
>> I can't answer for copying methods except that I find lighting almost
>> parallel with the image seems to work. You will also need to have a large
>> black card/cloth through which you poke the camera lanes else you will get
>> its reflection in the original image. Even the lens surround should be
>> black.
>>
>> Hope that helps but it work for me. But above all don't touch the original
>> image. I have been taught how to clean them and even then images can be
>> destroyed, just in the first water wash, so the moral is never do it
>> unless absolutely vital.
>
> All true! However, one can clean the cover glass. In fact, the
> Daguerreian Society published an article about a year ago pointing out that
> due to glass aging the cover glass should be changed if it is dirty or
> shows signs of deterioration. The foil tape (preserver) around the
> image can be carefully opened up, the cover glass removed, and preferably
> replaced. You could photograph the plate at this point and then reassemble
> the package using a good archival tape such as film-o-plast.
>
> One certainly doesn't want to touch the dag plate itself though!
>
> - Wayde
> (wallen@boulder.nist.gov)
>
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