After seeing some people etch their knives with electricity I got inspired. In the past I've used chemicals to etch logo's a bit deeper but this looked less messy and easier. Here's my BK7 logo logo before: My setup, 30 volt 2.5 amp dc power, some croc clamps and a metal plate bend around a piece of wood, cotton pads attached with a rubber band. Soaked the cotton in a water, salt, vinegar mixture: Then the process: Very happy with the end result: Now I need and AC adapter to blacken the logo's... haven't found one yet.
Thanks. Didn't time it... probably 3 minutes at most per side. Atbfirst I had voltage on 15v but upped itbto 30 to see it that wasbfaster. The current never exceeded 2 amp I think.