Yaki-ire sword bending in seethrough tank

[Robert Janssen]

Hey All,

 

Personally I can't get enough of these types of videos, astonishing to see what bending and stresses our blades have gone through while being quenched.

This video was posted on his facebookpage by Komiya (Rokuro) Kokuten, next in line in the Shiro Kunimitsu lineage. I'm linking to youtube now so all can see without needing a facebook account.

 

 

Enjoy!

[c2tcardin]

Great find, I didn't realize they curved forward then back as much as the one in the video did.

[Brian]

Yeah..always amazes to watch.

No wonder hagire develop sometimes.

 

Brian

[laowho]

Thanks! I never even knew they contracted forward before contracting back. I've always been a little skeptical about how much contraction was really involved in the quench, but now I'm amazed.

[Surfson]

You can see all of the clay coming off of it as it bends and then bends again. There must be some tremendous tension events during the process. I wonder to what extent the clay influences the first forward bend, since it cools faster in the ha and probably contracts first there.