Thanks for offering to write the article. I'll be looking forward to it, and I'm sure others will as well.
Right now there are three sticky threads in this forum (B&W: Film, Paper, Chemistry), which is the largest forum on APUG. We haven't really created that many of them, and we're trying to be careful about creating new ones. We have been merging some redundant threads, but we don't make all of them sticky. If there get to be too many (like a whole page of stickies at the top of one forum), we'll think about how to fix that, but at the moment, that doesn't seem like it will happen in the very near future. It will probably make sense at some point to split up "B&W: Film, Paper, Chemistry" into two forums (B&W Film and Processing, B&W Printing Papers and Chemistry, or something along those lines), but for now, Sean's got other things to work on.
While we're on the subject--for those who use the method of pouring spent fixer into a jug or a vat with steel wool--do any of you folks actually have someplace that will buy the sludge and recycle the silver from it? If so, where do you send it? I realize that silver recovery companies have systems with cartridges and such for larger labs, but does anyone have a name of a company that takes silver waste in the form you would get from homebrew silver recovery? I realize that it might take a while to amass enough sludge in a home darkroom to make it worth recycling, but say I wanted to save it up and do it every couple of years. Where would I go?
No Google answers, please. I want to know who really does it and what their experience has been with companies that will actually take this stuff in small quantities.
I contacted Imperial Smelting in Markham Ontario a few years ago. I asked them about silver from an electolytic recovery unit. After paying assay charges etc., it would only be economical for quantities with a value of about $1000. IIRC.
Picked up this thread late - as usual. I used these trickle systems (http://www.photomart.co.uk/ProductDe...roductID=31261) when I ran a hand printing lab, I found them v effective. They deliver the system, you use it for about a year and they come back and replace the bottom bucket. They keep the revenue from the silver recovery but it leaves you with a clear conscience - that you aren't throwing silver salts down the drain. £60 per year didn't seem a bad price to pay.
I was told by Photomart that they were imported from the US.
Hi there, I m new to this forum, but I ve red this thread with some attention, and you don't talk about recovering silver using piece or powder of copper.
Is it possible that after precipating the silver on the copper , filtering it and put everything (part of the filter also) in nitric acid it should remains some Copper and Silver Nitrate, and put appart those two thing almost easily (I know how to do this actually but never done it ), and then cristalise the silver nitrate to re-use it .
I m doing wetplate and albumen print and I can get a lot of old fixer (I took 10liter just to try during holiday) , with tetenal fixer test strip I can read that they contains almost 7gr/L of silver, so maybe it worth it ?
Porter's Camera sells an electrolytic silver recovery kit (http://porters.com/Merchant2/merchan...Category_Code=) for about $46. Supposedly if you go through a gallon of fixer a week, you will get 30-50 troy ounces of silver a year. Once the "silver magnet" is full you send it to the company that makes it (not Porter's) and they pay you for the silver. A replacement pickup cell costs about $18. I don't know if this is worth it, but at least there is someone you can actually get the silver to and recover some cash.
To add to the confusion Porter's Camera Store In Idaho I think sells a unit that consist of a step down converter and a plastic covered device that leeches the silver out of solution by electrolysis. When the unit that is submerged in the tray becomes thoroughly covered you place the device in a plastic bag and ship it back to the manufacturer. They will weigh the silver and send you a check. You can then order another unit from Porter's. I think I bought the unit and one replacement unit for about
$40.00 or there abouts. Since I usually use all my chemicals one shot the units last a long time. .02 for what is worth.
Originally Posted by Ian Grant
Did the article ever get written? I'm very interested in reading it.
Re ; jbannow's post..