2010年10月24日日曜日

Tamahagane for Iwasaki Razors







I also got a small piece of Tamahagane clot as souvenir from Iwasaki Razor Factory.

They told me that it was made in 1936.

Tamahagane is made by sand iron with three days and nights burn.
If the process successes, Tamahagane lump is there in the fire pit like this.
Of course, the lump is much bigger than my souvenir.

The Tamahagane lump has to be pounded so many times to be flat metal plate, and then it holds over so many times to make the product to be even quality.


Iwasaki Tamahagane Japanese Razor is approximately a double of price comparing with Sweden steel Iwasaki razor.

I have think over so many times so many ways: why is it?

Is it caused by Tamahagane steel cost?

Is it harder to sand it down to make the shape of razor?

Is it harder for forging process?

Mr. Mizuochi gave me one of tip to find out the answer indirectly.

He showed me about 50 of looked almost finished Tamahagane razors, but he told me that they have not been in forging process yet, and a half of them will not survive.
The half of them will be failed for forging process.

He is experiensced Japanese razor crafsman, but a half of them will be eliminated.

I guess that it is the one of the main reason what Tamahagane razor is a double of the price than Swden steel razor.

It looks very nice and they are almost ready to sell after put on the sharp edge, but he has to throw them away.
That is sad, and behind Iwasaki Tamahagane razor has that kinds of stories.

Actually, they do not want make Tamahagane razors, because the half of hard works are thrown away, but they have still Tamahagane steel, so they do not want to waste such a wonderful precious steel, so they decided to make Tamahagane razor little by little.
I went to there end of summer, and he waited for the temperature going down until fall season, because if the water temperature is too high, all Tamahagane razors are failed the forging process.
It is very sensitive process.

I asked one more question to Mr. Mizuochi.
Is Tamahagane razor harder to sharpening?
He told me that it is easy and smooth to sharpening.
I think HRC is high like 67 with Tamahagane razor, but it is not related with hardness and sharpening hard or easy.

If softer steel is easy to sharpening, we should try to sharpen shovel.
It is supposed to be very soft steel to protect from impact, but it is very hard to sharpening.

Tamahagane for Japanese sword, and Tamahagane for Japanese razor is different features.

Tamahagane for Japanese sword is cut protectors, and human meat, and human bone, so it should be strong for impact, and very sharp.

Tamahagane for Japanese razor is really hard, super sharp, and the edge is not fall a part up to 1 micron world.

That is why Tamahagane for Japanese razor is not made the same method as Japanese sword, so they had to research and try and out lots of times.

0 件のコメント:

コメントを投稿