The small power source (see Feb. 14 post for photo) works perfectly well for the larger etching set-up I made for cuff sized blanks and roll printing plates. I would still like to have a power source that would allow for setting the voltage to 1.5V. The little black one only goes down to 3V at a preset 2amp.
I used an acrylic display case designed for model cars for this tank that accommodates a 3″ wide X 6″ long (or smaller) piece. The tank is 4 1/2″w x 9″l x 5″h. The closer the anode is to the cathode, the faster the etch. The “wings” on the cathode and anode supports help to keep the plates parallel in the tank as well as providing a place for attaching the leads that is away from the water.
A deep etch on 18g brass took 3 hours. I used a soft brush to clean off both the anode and the cathode several times during the process. I plan to use this plate for roll printing a few copper cuff blanks, and then perhaps use it to make a cuff… or maybe will cut it up for several pendants.
The black on the plate shown above is the lazer toner resist. I removed this with Citrasolv before using the plate for roll printing silver for a ring band.
I used the etched brass plate to roller print an 18g sterling strip to use for a ring band.