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  1. O

    Hello

    ...to some broken\old it equipment and i've been collecting it for a while. I'd like to start processing it and already put some ram fingers in AP solution and got some gold flakes. I'm based in UK and without proper license i can't purchase Nitric acid to get AR but i realize that i can get...
  2. C

    When In Doubt, Cement It Out _cementation_

    ...regards to the need to agitate the solution with air to mix the solution to make contact with the copper; Will the addition of air cause the hcl to keep the precious metals in solution (AP leach ) and not cause cementation but actually just consume the copper ? I would like to understand this...
  3. Y

    Help Id

    Hey guys I’ve been lurking and learning for a bit but this is my first post, I’m making my way through hoke’s book but still have tons to learn! Id appreciate any help. I have recently processed a heap of silver contacts in AP they where in solution for about 4 days to remove the copper base...
  4. GoldRob

    Another Solder Issue

    After soaking in ap.
  5. Yggdrasil

    How to refine that stuff

    ...want to dissolve everything you can use hot diluted Sulfuric or even Nitric. But that will create a lot of waste and of course cost more. The AP/ Copper Chloride etch is cheap and needs no attention, but takes more time. The Sulfuric stripping cell is perfect for this, since concentrated...
  6. A

    Hard Drive contacts on ribbons

    I have a few like. Most of the drive arms have clearly copper wires, but a small number have wires that look like gold.
  7. O

    Removing the "Hat" from TOPHAT Transistors; Chemical saving method.

    ...They ended up here directly from the boards so they have not been cleaned in any way. My plan was to use a large stir rod in a bucket of soapy water to clean the cans (came from a greasy machine control) and hopefully knock the plastic stand off loose of the transistor. Floating to the...
  8. S

    Looking for advice as I am finishing the first phase of the AP process

    Edit to remove content already answered from another member.
  9. G

    Whats the best way to go about recovering this, silver stock pot.

    Well I just wanted to update. Lino was 100% on point. Ap did the trick. I processed 450 grams of the material in Ap. Just a couple of capfuls to 2 liters of hcl. After 3 days of bubbling I was left with nothing but relatively clean cement silver. No white precipitation. No silver chloride...
  10. Yggdrasil

    Accomplished nothing so far

    I'll comment in bold inside the quote: How much material did you have and do you have pictures of it? And please put your stuff away and read the material we gave to you. When you feel ready, formulate a step by step plan with what you expect of reactions. And we can comment and adjust it for you.
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