Sharpest blade I've made was made from a industial type power hacksaw blade.
A bit thin and more flexible than you'd want for heavy duty work but sharp as a scalpel.
Stock removal method leaving the saw teeth on the back edge.
No annealing needed this way. Just don't let the grinder overheat the steel.
The blade I used, found cheap at a salvage store, was long enough for two knives. I still have half the blade. Gave the first knife to a friend, never got around to making the second knife.
