I was instered in how a Katan was made. I heard it takes modern day Katan makers about six weeks with 9 hr days. If you could ponit me in the directino of some web sights or books, I would greatly apprecate it. Why is the Katan so sharp? I've heard that it is beacuse they fold the metal over and over (making the marks on the sword), that takes the oxygent out. Thank you for your help.