Hi Lazersteve and joem. It's been a while since I've commented on the board and intend to start posting all I've done (with pics) for the last year. I clicked both on joem's link for the book ($14.95) and on your site, Steve (which asks for $7.00 shipping and handling). I am a member of this board and have sent a few dollars to Noxx (last year though, must do it again this year). Which site should I order from? I live in Minnesota.
I wish to expand soon what I've been doing and expect to find out what I've not been doing (from you pros, including Harold, I trust all is well with him, I miss him yelling at me ~ jes' kiddin').
I've been using AP to lift gold from dishes, all kinds, and vary in success. I then drop with SMB. I filter. I dissolve in AR. I clean with HCL and then use Butyl Diglyme and drop with Oxylic solution on a hot plate. I must stir manually as I have not combination hot plate / magnetic stirrer.
I'm currently doing my first half-pound of fingers (a trial of sorts) from pc boards. I've removed all the foils and dropped some SMB into the solution to see if anything would precipitate. Nothing did. I have the emerald green solution mostly, but on the first rinse there was a dark, barely filterable substance which would settle on the lover half of the glass jar. In any case, I have the fingers now in a filter and not sure if I should just AR it, or Nitric it first (like I do after melting gold-fill/rolled gold into flakes or buttons).
Just going through many posts this morning (still winter in Minnesota, ya know) I realize I may have wasted much gold from the AP solutions from the glassware (china, stemware, etc.) but actually it's still paid for itself. And yes, Harold, I had been using Stannous. Just not lately. From my reading today, I must study the zinc aspect of precipitating any possible AU in solution from the fingers (and from my glassware). Who sells zinc, and for that matter tin, by the way (Steve, I think you sell tin by the gram, yes?)
I did an inventory and I have processed 90 grams of gold in the last year and a half since I lost my job. I estimate (not counting tax deductions for my Natural Treasures business) I paid a bit over half that to acquire all the materials and received unbelievable joy from this adventure. I might be helpful if I document those past processes as everyone I ever spoke with said there wasn't much gold on plates. Well, on certain ones (and certain stemware), there is much gold. I've not yet sold any of my gold buttons.
I also want to explore reverse electro-plate. Also will look into your info, Steve, on gold pins. I get so frustrated for what all these "gold bearing buttons" are selling for a gram on Ebay that I did a study on computer plated pins (melt, Nitric, AR, etc.) From 144 grams (melted) I obtained only 0.3 gram AU - that's about 0.21 percent. So that's barely 10 cents worth of gold per gram ($46/g), and people pay upwards of a dollar/gram????? How can they sleep at night? Heck, I get from 1 to 1.2% on mil-spec plated contacts (with color banding that I can identify as 50 micro-inches plating - which makes me suspect for any Ebay item stating "Mil Spec" and the picture shows no color banding on the contacts). As the judge states on old Boston Legal re-runs, "That's preposterous!!". That was of course only my first test.
Lastly for now, after I've dropped the gold and cleaned the Butyl Diglyme, I keep the spent solution and re-drop with SMB. I'm collecting those filters for possible PGMs. Not sure though I'll ever try to get them out. I would give them away. And as with all my solutions, after I get the gold, I drop any silver with copper, raise to 2.5 and drop copper with cast iron, then raise ph to drop iron, and in a couple occasions used ammonia and slight heat to form a yellow-green substance which I then filtered (with difficulty) and I assume that might be nickel? I've buckets of metals now. I would love to cast copper ingots. Not sure what to do with the iron remains, any ideas?
Again, sorry I've stayed away so long.
Nick