If you have some titanium lying around and you want a new look, check this page out. It shows how a simple chemical reaction with Coke and different voltages can anodize titanium! Click the picture for more information.

We heard a while back on Reddit someone mentioned how Coke can anodize Titanium in different colors based on the voltage applied. Immediately we had to try, luckily Steve had some titanium sporks lying around jut begging to be anodized.

You can use something as simple as Coca-cola (sugar-free = less sticky) to dip. Comet cleaner mix also supposedly works. The voltage you supply determines the color of your anodized titanium. In my case, my power supply only went up to ~40 volts, which ends up being around the blue spectrum. The higher you go, the further you travel through the rainbow. There is some wavelength cancellation, so the colors don’t correspond perfectly. It goes: Bronze, Blue, Light blue, Yellowish, Purple-ish, Cyan, Green. This is a range of 20v-100v supplied. If you do not have a variable voltage power supply, you can daisy chain 9v batteries by snapping them together. They only snap together in series, which adds 9v each time. Note: You can always ADD voltage to change color, but you can’t go back to a “lower voltage color” once you have changed it.

Here we finished anodizing the sporks as we once started on an imgur post, but this time we had over 96v dc to play with! I know this seems absurd, but at friend had tons of slightly used CR123A batteries (over 200) and he gave them to us. After checking the voltages of these batteries and sorting through the bad ones. Then we built a simple battery holder using scrap wood lying around:

Second method: Dip your objects in Coke, + to Titanium, – to coke. Use sugar-free! Less sticky.

In the end, we used 96volts to get gold, and painted a permanent smiley face on the other (I know, we suck at painting.)