I have a substantial amount of processed B&W negatives that will eventually be
disposed. I would like to remove the emulsion in batches and recover the siver
before I get rid of the base. Does anyone have any suggestions on emulsion
removal in bulk from film?
Thank you... Bill
On Apr 25, 2019, at 11:10 PM, `Richard Knoppow <dickburk@xxxxxxxxxxxxx> wrote:
Recovering silver can be done in a couple of ways. I think a web search
will turn some up. The big motion picture labs used to recover silver and
regenerate the fixing baths. Since in color processing virtually all the
silver is removed from the film a large lab can make a lot of money from it.
A small home darkroom not so much but I have heard from people who recovered
enough to earn enough to make it practical. Because all the silver is removed
from color film quite a bit more can be gotten than from B&W where some must
be left to form the image. Fixer which has been overworked to the point where
its cloudy will plate clean copper pennies. Lots in the literature about this.
On 4/25/2019 7:51 PM, Zack Widup wrote:
A friend of mine who was a professional photographer had a machine that
electroplated the silver out. It had some thin metal disks (stainless steel,
I think) that the silver plated on in a tank full of spent fixer. He would
then remove the disks, flex them and the sheets of silver would pop off. I
think he recovered quite a bit of money doing that and selling the silver.
Zack
--
Richard Knoppow
dickburk@xxxxxxxxxxxxx
WB6KBL
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