Anyone Ever Try The "Sound Test" On 2001-2003 Quarters?

I've placed the nickels in the vinegar and waiting now if it will turn green. The teacher did come in, I think for whatever reason she had to leave is done. I'm not sure if it will turn green because I'm still using the same batteries since the start. I'm waiting for the people in the class to come out when they're done so I can continue.

Also a friend wants to plate some quarters with copper and she wants me to help her. So I'll update you when I'm done in the lab.

We were using Copper sulphate, and for the anode either a pencil lead, zinc core penny, or a zincoln with signs of zinc rot. Why use the nice copper ones when I can get rid of zincolns that I hate which I got so many in the States? Or I can try uncladding an American dime or quarter to get the copper core. The plating came out mostly pink instead of red though.
Also had some fun plating a penny with a nickel make a silver penny heh heh
There was some chrome in the lab, I tried plating a penny with it but it came out grey instead of blue like the block of chrome. Weird.

I've prepared around 140mL of Nickel acetate solution. I think I may have accidentally contaminated it with some Copper, since I used the same wires, but I don't think it matters too much in this case. The lab is closed for the day, so I'll continue tomorrow.
These things heat up quite a lot don't they. Connections become too hot to touch quite fast.

Who knew electroplating stuff is so much fun?

I used 5 batteries to speed up making the solution and it did bubble a lot. There was smoke coming out of it, not sure if it's boiling or fuming.

Unfortunately I don't know anyone from the tech department. The lab has some copper sheets or whatever you call it, but my friend wanted to use Copper sulphate and a graphite anode. Plating by other coin was my suggestion, since I'm unplating coins anyway. I'll ask tomorrow if they could spare some copper sheets for an anode.

By the way, the result of using copper from a zincoln results in a brighter plating result than using graphite, but you can produce interesting patterns on the coin plating when using graphite because it bubbles and the bubbles are quite "solid" and they stick on the coin. Except when it got left for too long and the quarter was zinc plated instead.

Edit: So far I've removed these layers from a 2012: nickel, copper, nickel, copper. There must be something wrong that I did in the first time because the penny was coated with a black substance, maybe it was Carbon, I don't know where that came from. There's another silvery metal under it but I don't know what it is yet. And I've left the coin in the lab. I can't continue it until Monday, because students aren't allowed to be alone in the lab.
The teacher had to go home just when it starts getting interesting

You said you are using a carbon rod as a cathode? I don't know anything about that, but if you use nickel as the cathode it should strip right away, especially at 50v.

It was less than 1 minute to strip the dime at 12 volts.

I would use nickel for nickel and copper for copper. The current that low is also a problem, the solution could be contaminated. Add a touch of salt.

I have found that if you do not let the wires go into the acid, the process works better.

I was using 60V, more than enough to spark when I completed the circuit and still nothing. So I gave up with the batteries and borrowed a cut adaptor from a friend instead. So much faster.

I found out what the layers of a 2012 quarter is. Nickel, copper, nickel, some black substance (I assume carbon), a shiny silvery coloured metal (I assume steel). No more layers.

Sadly I didn't have time to do the 2001-2003 quarter because my teacher told me to clean up, she needed to use the space.