Quote:
Originally Posted by aergistal
There is no such thing as a refined form of rust. The term rust is colloquial.
The forumla of rust is Fe2O3.nH2O. When the H2O is bored and leaves for a better place, the thing that remains is Fe2O3 - red iron oxide, the thing you refer as rust.
I'm curious too about the manufacturing process of tarnmatte. I didn't find a lot on the subject.
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Refined Iron Oxide would be the process of taking the chunks of rust and breaking it down to a fine powder and removing any impurities so it can be applied to something (in this case Tarnmatte) in a evenly distributed layer and helping to prevent large amounts of any further oxidation.
I also, did not find much if any information on the manufacturing process. I suspect that since it is primarily used in military applications, this information was squelched.