The manufacturing method of the Japanese sword 2

Training（I train the top)

Around 12 times lapels are performed for 15 times, the money of side for the money of blade for money of ridge with a mandrel nine times seven times. I send impurities such as the sulfur and unnecessary carbon, nonmetal inter. by repeating training while breaking the steel which I swat it and postponed back and am finished to the steel that I am homogeneous and am tough to amount to several thousand levels.

Forge welding and 沸延 べ

I forge three pieces of books elsewhere to watch constitution of the steel of the Japanese sword and each department name (I train a section, Yomo filling) 造込 and I roll it up and forge it, and there are former lying down discipline, innocence discipline. I hit it so as forge welding does money of ridge, mandrel, three levels of the money of blade, and to be able to take thickness 20mm, 40mm in width, materials 4 of around 90mm in length and grow it and separate it to 4 after I excite lower discipline and the second product, and a mandrel, money of ridge, money of blade, steel of four kinds of the money of side were provided by upper discipline. This is called "money of core". I swat it so that it is heated, and length increases twice as much as the money of core, and it is grown, and the side money is separated by the center, and two money of side of the length same as money of core is made.
（Watch 造込 of the Yomo filling discipline; appearing,）It is repeated by side money, money of core, the order of the side money, and I excite it, and it is done forge welding, and I hit it to thickness 15mm, 30mm in width, around 500-600mm in length, and it is grown. "A lever" is separated, and "stem" (a basket) becoming the grip part of the sword is excited, and it is done forge welding.


Bare total of

I perform "bare total of" (すのべ) to beat in the form of the sword and I cut off the tip and make an expired point. I fix the duster form in a mallet carefully to decide the completion form of the Japanese sword that a figure here is last.


Fire polishing

I knock on the ridge of the sword blade to become the triangle and I swat the side (level ground) of the blade to become thin and postpone it. I knock on the ridge of the stem and round off and I swat "鎬地" (しのぎち) last and fix the figure. I heat the whole sword blade to azuki color low and do 除冷.


I tighten the sky

I swat sharpener last joke, level ground and 鎬地 in a mallet in a wild whetstone and cold-work a surface black dirt after getting cold. Revise a ridge and the straight line of the blade; and a harpoon (do not do it)： I sharpen unevenness with the large-sized pushed by hand plane which seems to be a Rino Oshikiri blade sharpening the iron which is called) with 銑. "Length of a blade" and "ward" (I wait) are decided at this stage.


A straight sharpener

I perform "straight sharpener" (なまとぎ) that a sharpener drops the scrape of the plane in a whetstone. I drop oils and fats in a straw ash including the water and dry it afterwards.