[pure-silver] Re: Image stabilizer
- From: Jon Mided <photosource@xxxxxxxxxxxxxxxx>
- To: pure-silver@xxxxxxxxxxxxx
- Date: Tue, 7 Jun 2005 09:17:21 -0400
Ray's information is correct. A friend of mine, Ryusuke Ito, has
provided an annotated translation of the Ag Guard MSDS as follows:
AG Guard is made up of 0.5 to 1.5% 2-(Amidinothio)ethanesulfonic acid
and 80-100% water.
The CAS number for 2-(Amidinothio)ethanesulfonic acid is CAS 25985-57-3.
Description for the two products are as follows:
AG Guard: Microscopic Blemish Prevention agent
AG Guard K: Image Stabilsing Finishing agent
As for their chemical composition, it appears to be exactly the same
with regard to proportion of the active ingredient in proportion to
water. In comparison, Sistan is based on Potassium Thiocyanate (CAS
333-20-0).
Chemical composition (lists only those chemical that constitute more
than 1% of the whole):
Chemical name, Composition amount (wt%), CAS Number,
2-(Amidinothio)ethanesulfonic acid, 0.5 - 1.5%, 25985-57-3
Water, 80-100%, 7732-18-5
Molecular formula:
25985-57-3: C3H8N203S2
7732-18-5: H20
--Jon
>Here is the CAS for the active ingredient...
>
>CAS# 25985-57-3
>which is used in a concentration of 1% (plus or minus
>a half percent)... for the stock solutuion.
>
>I belive this would be
>
>2-amidininosulfanyl-etansulfonat
>
>(C3H8N203S2)
>
>but I have not confirmed this. There may be a spelling
>problem....
>
>When I locate the patent I will post that info too, if
>anyone is interested.
>
>Ray
>----------------------------------------------
>
>
>
>--- Richard Knoppow <dickburk@xxxxxxxxxxxxx> wrote:
>
>>
>> ----- Original Message -----
>> From: "Jon Mided" <photosource@xxxxxxxxxxxxxxxx>
>> To: <pure-silver@xxxxxxxxxxxxx>
>> Sent: Monday, June 06, 2005 11:12 AM
>> Subject: [pure-silver] Image stabilizer
>>
>>
>> > I've seen the recent postings in the Agfa
>> Insolvency
>> > thread and am
>> > interested in producing an image stabilizer
>> similar to
>> > Sistan or Ag
>> > Guard to sell under the Digitaltruth brand. I'm
>> currently
>> > working
>> > with a lab/chemist to produce some new developers,
>> and its
>> > important
>> > to me to make the best possible product that would
>> be of
>> > genuine use
>> > to people. If anyone wants to help formulate a
>> stabilizer
>> > and test
>> > samples, I think we could get this into production
>> quickly
>> > and at a
>> > low cost.
>> >
>> > --Jon Mided
>> >
>> > Digitaltruth Photo
>> > http://www.digitaltruth.com
>>
>> The two products are for a similar purpose but
>> are
>> different. Sistan contains Ammonium thiocyanate and
>> a
>> wetting agent. I think the wetting agent is there
>> because
>> sistan is intended to be the last bath the film or
>> paper
>> gets but it may be needed for some other purpose.
>> I don't know what is in Ag-Guard. I believe Ryuji
>> Suzuki
>> said there is a patent covering it which includes
>> formulas
>> but I don't have the patent number. Being patented
>> would
>> prevent you from making it anyway unless Fuji is
>> willing to
>> license you. I don't think AgfaPhoto is going to go
>> out of
>> business anytime soon despite the recent stories.
>> Neither
>> will Fuji but they don't seem interested in
>> marketing their
>> chemistry in North America.
>>
>> ---
>> Richard Knoppow
>> Los Angeles, CA, USA
>> dickburk@xxxxxxxxxxxxx
>>
>>
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>
>
>
>
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