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I use the stainless steel foil that is rated for 2200 degrees to heat treat my S30V knives. It comes in a 25 foot roll at a cost of around $70.00. I heat treat 2 knife blades at a time in the same foil packet. I cut 10 inches of foil off the roll, fold and double crimp the ends and one side into a packet. Two of my hunting knife blades will fit into the packet.
That works out to 30 packets per roll and 2 blades per packet or a total of 60 blades heat treated per roll of stainless steel foil. Just a few cents over one dollar per blade for the stainless steel foil.
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