I heat the blade up in a deep pile of charcoal coals tell in none mag. then i edge quached them in goop, conail oil parfen wax.then i sticked them in sand to cool off all the way sand and clena them to get the oil and sand off. then in the oven at 350 for an hour at a time tell it gets straw color.the top one has a ghost temper line when u look in the right light. thanks agion for the nice words