hey everybody, i'm new to the forum and new to the art of bladesmithing, although i have been a metal sculptor for many years. after reading many bits of info from many sources i'm confused. i'm trying to make a blade from an old file and i can't figure out the proper way to temper/heat treat it. do people use the oxide film color spectrum method (as one might use when blacksmithing a chisel for example) or is the best way to heat it in the oven. if using the oven method is any further quenching done? sorry for my ignorance, but you all seem to know whats up and any insight would be greatly appreciated. cheers!
-J-