The Kodak publication 'Conservation of Photographs' conveys the possibilities of using thiourea treatment and/or ammonium hypo reducer treatment for silver tarnish and stains.It also lists the formula for the cleaning solution comprising of ammonia, thiourea and phosphoric acid.
But the best solution could be to get a professional glass plate conservator's help. I am sure that there are 'glass plate specialists' in the USA.
Regards
karthik v
Quoting Irvingyoung2@aol.com:
> I realise that this enquiry is not in the direct thread of alt processes but
I'm hoping that someone out there can help me. I have a fairly large number of
old glass negatives, these are in the region of 100 years old(No, I didn't
take them myself). The problem I'm having is with "silvering" of the image.
I have tried using a proprietary tarnish remover on a few with some
success, but am a little nervous of subjecting the rest of them to the same
treatment. What I would appreciate is any advice on restoring these negs without
risking irreversible damage.
Irving Young, Lancashire, UK.
Received on Thu Apr 6 00:15:13 2006
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