The first thing I did was to redraw the shape of the blade. I did a total regrind of the blade and after going through the stones up to a full uchigumori finish, i gave it a mirror finish. Then I built a new handle and a new saya for it (still in the making). The seller stated that the steel was true tamahagane, but that is not very likely. It is probably a blue steel variety. That said, the edge is even harder than my shiroko honyaki @HRC 65, and takes an absolutely incredibly sharp edge. This is very possibly my sharpest blade to date. Even sharper than my Doi Shiro #1. Some pictures from the process below. Enjoy.
Before: Note the odd "hanging" profile of the knife including the handle. It almost looks a little bit depressed :o)
After: The profile is "straightened out" to a more balanced appearance
Before: Ugly machi...
After: Polished machi :o)
Before: Really rough grind...
After: Mirror finish :o)
In the below picture you can see the reflection of my ceramic wall tiles in the blade. Note the semi polished blade road. Towards the very edge you can see the reflection lines from the tiles "bend" a bit due to the hamaguriba (clam shell) sharpening. The reflection amplifies the hamaguriba curve significantly because the blade is held askew related to the tiles, but it shows the principle of hamaguriba.
Before: Simple handle... not at all bad, tho'. Ho wood and water buffalo bolster.
After: Custom (by me) Macassar Ebony octagonal handle with silver inlays and water buffalo bolster :o)
Very nice work !! :)
ReplyDeleteHow do you polished machi?
ReplyDeleteThe machi was polished by wrapping different grits of sanding paper around a Ø7mm round and 20cm long hardwood stick. I used following grits #80, #120, #240, #360, #600 and #1200 consecutively. When everyting was smoothed out, I primed a piece of leather with a mix of 1u diamond spray and 0.25u aluminum oxide powder, wrapped it around the same stick and started polishing. After about an hour of polishing, the result was as you see it in the pictures.
ReplyDeletestunning transition, thanks for sharing. it's amazing how a 40+ year old 'lost' knife can be restored to look like it was just forged. well done!
ReplyDeleteabsolutely gorgeous handle to match too :)
How did you round off and polish the machi like that? Specifically, what steps did you take to accomplish that?
ReplyDeleteSo well done! See you on KKF.
Please see an earlier question and answer about the same topic.
ReplyDeleteRegards,
Harald.
Hello I have a Vintage knife that i Need help to identify? It is similar to the tamahagane blue steel yanagiba knife You have restored! I would like to send You some pics? Not sure how. My e-mail is 1.TheVintage.UnerGround@gmail.com
ReplyDeleteThanks David.
Hi.
ReplyDeleteSorry for my late reply. You can send the pictures to darkhoek@gmail.com . I'll see if I can help in any way identifying your blade.
Regards,
Harald
Awesome project! You had restored your knife just like a new one. Thanks for sharing it to us!
ReplyDelete