How to color aluminum for jewelry purposes
Q. I'm a student at Massachusetts College of Art, I'm in the metals department, and right know I'm experimenting on making jewelry with sheet aluminum because its a really light material, and I found a place that sells it really cheap. I made a couple of rings which I really like but I want to learn how to color them. Just to try out a new technique and also because I like color. thanks!Alexia Cohen
Student for Fine art Metals - Boston, Massachusetts
In a glass tumbler make an anodising bath with sulphuric acid the same strength as battery acid. Hang your aluminum jewelry, after thoroughly cleaning with lye solution and washing. Connect this to +ive of battery charger. Hang another aluminum plate in solution and connect to -ive terminal of charger. Let current flow for about ten minutes. Make sure the solution is not hot (55° F)
No other metal other than aluminum in the acid. Take out, wash, and put in colour solution in water to absorb the colour 30 minutes. Take out and put in boiling water to seal the colour by changing the crystal structure of aluminum oxide. Take out and cool before you sell it. Good luckopinder singh
hobbyist - Windsor, Ontario, Canada
Please pay very close attention to the last 2 words of Opinder's advice ... you'll need it!
anodizer - Boise, Idaho