Ok. Good suggestion
Bill
Sent from my iPhone
On Apr 27, 2019, at 9:42 AM, Robert Shanebrook (Redacted sender
"makingkodakfilm" for DMARC) <dmarc-noreply@xxxxxxxxxxxxx> wrote:
You should realize that the silver nitrate you make will be of low
purity. The impurities may contaminate your emulsions. 99.999% (aka 5-9
silver) pure is used to make film. Typically photographic manufacturers do
not use recovered silver. They sell their recovered silver for other
purposes and use mined silver that is then purified before making
emulsions.
Consider trading your films with a refiner to get at least 99.9% (3-9
silver ).
makingKODAKfilm.com
On Saturday, April 27, 2019, 9:22:15 AM EDT, Bill Riley <bill@xxxxxxxxxxx>
wrote:
I doubt that I will try to sell any recovered silver. As pointed out. The
amount I get and market prices at best might earn some beer money.
What I probably will do is add it to some other sources of recovered/salvaged
silver and make some silver nitrate. I’ve been playing with wet plates a bit.
So, I imagined It might be interesting to make an ambrotype or glass negative
out of the silver I’ve recovered. It’s a circle of life kind of thing.
Once again, thanks for your comments and suggestions.
Bill
Sent from my iPhone
On Apr 26, 2019, at 8:14 PM, `Richard Knoppow <dickburk@xxxxxxxxxxxxx>
wrote:
I would give the bleach a try. It may also loosen up the support. x-ray
film, unless its from the 1930s, is probably on some sort of safety base
film. The bleach will dissolve the gelatin of the emulsion and also any
back coating. Also, a lot of x-ray film was double coated, that is, an
emulsion on both sides to increase its sensitivity. Just soaking it in warm
water may get the sheets apart and make them easier to deal with.
I have no idea how much metallic silver may be in the emulsion but x-ray
film typically had thick emulsions so there might be quite a bit. A web
search should show the value of silver these days. Its at least an
interesting experiment and might result in some beer money.
On 4/26/2019 4:17 PM, Bill Riley wrote:
Sorry everyone. I did not mean to strike fear in anyone. They are in fact
old x-ray B&W negatives that were saturated by water and now exist as
bricks of film base and emulsion.
They are not photos of political figures. My attempt at humor was poorly
delivered. That’s why I’m not on the comedy circuit. :-)
I thought I might find a way separate the emulsion from the base. I
understand the process of separating the silver from the emulsion. I agree
that it may not be economical to recover enough silver to buy a new car.
:-)
I was just wondering if anyone had any ideas on removing the emulsion from
a bunch of trashed film.
The bleach suggestion seems tenable.
Thanks to all for you suggestions and advice.
Bill
--
Richard Knoppow
dickburk@xxxxxxxxxxxxx
WB6KBL
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