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Explaining Japanese knives/swords to a layman

Sun Dec 02, 2012 8:38 pm

I have a friend who insists that the patterns that we see in so many Japanese knives and Swords are because ceramic is somehow put into the metal. He believes that the clay he sees in knife forging videos is somehow ceramic. I explained to him what Kurouchi was, why the clay (which he insists is ceramic) was used in quenching and tempering, and how the knives he is talking about are actually forged from multiple different types of steels giving it that look, utilizing different layers for specific cores, etc.

Is there a resource, or a video which explains this in detail so that I don't have to argue with him anymore? I've ran out of ways to tell him that clay = / = ceramic.

edit- he also insists that this "ceramic" is why Japanese knives/Swords NEVER (yes I said never) need sharpening. I showed him a few photos of a couple of my Japanese knives and he commented on how I never need to sharpen them, haha.

TIA!

:mrgreen:

edit- OH, and he doesn't quite like the "rust" on my Konosuke (Mark's forced patina method).... I quite like it and I had no clue that Ceramic could rust :lol:

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Re: Explaining Japanese knives/swords to a layman

Mon Dec 03, 2012 1:22 pm

Here is a NOVA documentary of handcrafted sword history and creation process from start to finish:

http://www.youtube.com/watch?v=xg5YmyxlO_U

It's an hour long if you have the time :) but it's really entertaining!

Re: Explaining Japanese knives/swords to a layman

Mon Dec 03, 2012 1:49 pm

And another link on sharpening swords KATANA TOGISHI there's 3 parts in all (subtitled) w/ English narration

Part 1: http://www.youtube.com/watch?v=T5lmhZiup3o

P2: http://www.youtube.com/watch?v=55BlqOj-hqo

P3: http://www.youtube.com/watch?v=nRv8mWDmviM

One to watch clay applied to the blade and quench -no subtitle
Part 5: http://www.youtube.com/watch?v=sv5uIlSErB4

Re: Explaining Japanese knives/swords to a layman

Mon Dec 03, 2012 2:16 pm

This link should end the confusion it also explains the different patterns used for construction as well as the chemical make-up of the steel used. http://en.m.wikipedia.org/wiki/Japanese ... #section_1

Re: Explaining Japanese knives/swords to a layman

Wed Dec 05, 2012 2:20 am

Thanks guys!

Re: Explaining Japanese knives/swords to a layman

Wed Dec 05, 2012 3:25 pm

TEXAN <> I really dig your forced patina.Image

Really surprised to see the HD steel take it so well. My oldest HD is a year now, and even w/everyday use it hasn't developed even a hint of patina.
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