
When we put a flame to metal it causes a chemical reaction called oxidation. Oxidation causes a skin on the metal that we refer to as "fire scale".

By soaking the metal in heated acid, we remove a good bit of the fire scale. We need the fire scale gone for two reasons- we need the metal clean in order to solder again and we also need it clean so that we can polish it and get the lovely finish that one expects from a lovely piece of jewelry.

After the metal soaks in the pickle for 15 minutes or so, we neutralize it by dipping it in a baking soda solution.

The very first teacher I had for metal smithing never told me about acid neutralization, so for the first year of working with metal I kept getting tiny holes in my pants from dripping acid on them! That's one of the interesting things about this craft, there are a million different ways to do one thing and the technique you are taught sometimes makes the difference between easy or difficult mastery of said technique.





