I have been working on the best ways to electroplate my printed models in house and for cheap. I think I have hit upon a nice process that is showing great promise. Here, I would like to show everybody the process as I progress and get any feedback from interested individuals or anybody that has been researching this as well.
Here is the print I have been working with. I chose the default male head bust (though I moved the mouth a little wider) from zBrush since it is something many of you can duplicate on your own if you have access to zBrush. I sliced the face to just before the ear and mounted it on a plate that I use as the print base to adhere to the plate of the printer. No supports, small, and detailed enough to get a great feel for the success (or lack of) in the plating.
I am producing a copper plate over a graphite surface that I painted on with a small brush and a q-tip. To make the graphite stick and retain all possible detail, I waited for the piece to fully cure (usually in the sun for 15 minutes), then I applied extra resin to the surface. I used very little, just enough to get the surface tacky again (I wiped off all excess). Then I immediately applied fine powdered graphite until the whole face was covered. I used a q-tip to really press the graphite into the details and then polish it to a smooth finish. The graphite loves to stick to the tacky surface and is naturally microscopically thin (thus able to get every blemish and detail).
Then I used a bath with heated tap water, dissolved copper sulphate and a little vinegar to electroplate in. The power source was just an old model train controller. A coil of copper wire was used as the anode and the piece was placed as the cathode. It visibly plated fast. I could see results in just a few tens of seconds. To get the plate thickness I wanted, it took a couple hours. I then buffed and polished with a dremel.
Here I have posted the initial print, (sorry for the bad crop)
the very first test (just to see if the concept would work),
and my latest attempt.
The latest attempt saw much better results with just a little tweaking. Keep in mind that this was all done on a super bargain budget and with all sorts of things that could (and will!) be easily refined; such as purified water, special care not to contaminate the plating solution, proper post print clean up (I did not even detail scrub the parts when they came out of the printer, so they have âanomaliesâ), more purified copper, and stronger plating bath (using sulfuric and muric acid).
If there is enough interest in this topic Iâll post a much more detailed accounting of the process. Meanwhile, Iâll keep updating as I progress. I am happy to answer any and all questions.