Earlier, I posted about a method that I'm using that beats anything else I've tried by a long, long way. For those who might be interested, I've made a short video. BTW, it does contain some useful information not in my original post.
This guy needs to put more emphasis on the safety aspects of using high temp molten salts.
Heat treating/tempering/annealing with salts can be very effective but also has major consequences if you get even a tiny drop of water/oil or other liquid in the solution. If that happens you can have an instant volcano of 800-1200 degree liquid exploding in your face, the walls and ceiling of the building you are in. Him having that pan of soapy water in such close proximity to his molten salts is borderline stupid, let alone having the setup in his house.
Put your setup in an area with proper protection surrounded by non flammable material and good ventilation so if you do have an issue you won't burn your house down or scare your lungs from the caustic fumes.
“Some ideas are so stupid that only intellectuals believe them.” ― G. Orwell
"Why can't men kill big game with the same cartridges women and kids use?" _Eileen Clarke
"Unjust authority confers no obligation of obedience." - Alexander Hamilton
Anybody who seriously concerns themselves with the adequacy of a Big 7mm for anything we hunt here short of brown bear, is a dufus. They are mostly making shidt up. Crunch! Nite-nite!
NOTE: If heated above 590°C this salt will begin to decompose, releasing hazardous nitrogen oxide fumes . At higher temperatures the salt becomes a powerful oxidizer that may cause spontaneous and violent ignition of flammable materials including wood, wax, oil, plastics, and light metals. Use only in a well ventilated area. If at any point in your annealing session the pot begins to make a sound like a boiling kettle, emits visible fumes, or the salt begins to develop a yellow colour you are running the pot too hot. I do not recommend using this salt without a temperature measurement device that is known to be accurate in the range of 300°-600°C.
“Some ideas are so stupid that only intellectuals believe them.” ― G. Orwell
"Why can't men kill big game with the same cartridges women and kids use?" _Eileen Clarke
"Unjust authority confers no obligation of obedience." - Alexander Hamilton
