[Alt-photo] Sodium Thiocyanate For Fixing Out Lumens
don at sweetlegal.co.nz
Fri Aug 18 04:27:15 UTC 2017
On 18/08/2017 4:03 p.m., `Richard Knoppow via Alt-photo-process-list wrote:
> I could not remember the name of AGFA Ag guard or would have
> mentioned it before. I am glad to see you researched it and found it
> effective since there was some doubt in popular literature. I must
> still have several bottles of it.
> I am sorry to hear that no one is interested in silver image
> protection any more. I am sure that is very discouraging.
> I am not sure of the title of James paper that I was thinking of,
> something very similar to the one mentioned.
> On 8/17/2017 8:55 PM, Ryuji Suzuki wrote:
>> I forgot to advertise my own work.
>> Fujifilm Ag Guard is effective in protecting silver image from
>> oxidative attacks (that is not my work, though I confirmed it myself).
>> So is an alkaline solution of 2-mercaptobenzimidazole (formula in my
>> The actual paper in PDF (Japanese language only) is here:
>> I sent it to Doug Nishimura and Gawain Weaver and asked if it's worth
>> publishing in English. Some said no one was researching conservation
>> of silver imaging material (no more research funds).... don't bother.
>> Some also cautioned me that professional conservators are discouraged
>> from performing any process that chemically alters the image, silver
>> or otherwise. Although Ag Guard and 2-MBI do not alter the image
>> itself (that is the point of this approach, as opposed to toning),
>> and this point is explained in the paper, the distinction probably is
>> not very clear to average conservators. So, no, there is no English
>> version published anywhere. (Besides, this journal was one of the
>> very few last remaining journals that published new researches on
>> silver imaging... at that time back in 2010/2011.)
>> Ryuji Suzuki
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