What am I seeing here...
- Thread starter Walla
- Start date
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tostadas
Hobbyist / Craftsman
I don't think that's the right way to slice that giant cake.
VincentBeek
Well-Known Member
I would say 'Kids don't try this at home'.
spaceconvoy
Senior Member
Very cool! It's like a automatic edge-convexer. Judging by his channel it seems they're in Uttar Pradesh, India. Must be a local stone, but there's no easy-to-google info. I'd guess it's probably not worth tracking down if that's what you're thinking.
Walla
Well-Known Member
- Joined
- Nov 12, 2017
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Wasn't even thinking of anything like that... it's just so blob like...when I first saw the thumbnail I thought it was a cake or something... anything other than a stone...
Most of us with out flat, rectangular stones, our diamond plates etc are so removed from anything like this...our ancestors just picked up whatever stone they could find and used it until they found something better... people have been sharpenng like that for... forever...
That being said...it would be interesting to try it out...
Jeff
For edge sharpening, a convex surface is probably enough...
Villanelle
Active Member
I was curious so asked in YouTube if he made the stone that way purposely or if it just wore down and like lightning he responded: “It is a little bit flat only, using it for some years,it has worn down.”
He’s seems used to it this way and must have the technique to make it work.
He’s seems used to it this way and must have the technique to make it work.
Looks like ridge sharpening. The pressure is highly increased and thus making everything a lot faster. In the end he's using a pretty flat spot for the sides with whatever that thing is.
In the old days people didn't care much about chipping, geometry and stuff like that. Was the edge a penetrator? That was sharpening. I've seen people sharpening knives on concrete in front of the house for many many years. That was the only way. Sharpening stones? They would laugh at you for days.
Knife2meatu
Senior Member
I wonder what the powder added to the stone is.
Chocolate
Kippington
A small green parrot
I've noticed that the best sword polishers in Japan regularly use non-flat stones, and always wondered what they would have to say if someone told them to flatten them...
They all seem convex. I found a clip showing how they make these, it's here somewhere. We usually battle concave forms. Convex stones were used for razors long ago, as well.
Kippington
A small green parrot
Wait, so you think they don't battle concavity in Japanese sword edge geometry? It's almost always a convex grind, but still done on a convex stone.
http://www.toyamaryu.org/edge_geometry.htm
https://www.thesamuraiworkshop.com/...ed-the-edge-of-my-sword-what-should-i-do.html
http://www.ksky.ne.jp/~sumie99/shaping.html
http://www.japaneseswordindex.com/niku.htm
https://www.thesamuraiworkshop.com/...of-your-katana.html?highlight=" order by date
I was thinking about what happens to our stones and why we flatten them. But it's quite interesting. I see in one of these links that there's a drawing about the way the sword is prone to bow, following quite a convex stone path.
Kippington
A small green parrot
This picture? I wouldn't call that a convex stone path. In fact, I suspect that a convex stone could help to stop this from happening.
Yes. But here this effect is regarded as negative with a flat stone because the lack of proper contact. What if the stone was convex to start with?
I also don't imagine happening with most knives, if at all even with the flexible ones as they are rather small.
I see a bit of a difference between making some stones convex to serve a purpose and just "abandoned" from being kept flat. That was my original idea, that our stones turn concave more or less and this definitely will not help us. So we need to do something in the concave stone battle.
I also don't imagine happening with most knives, if at all even with the flexible ones as they are rather small.
I see a bit of a difference between making some stones convex to serve a purpose and just "abandoned" from being kept flat. That was my original idea, that our stones turn concave more or less and this definitely will not help us. So we need to do something in the concave stone battle.
I think its foolish to say that people of the past did not care about cutting implements or did not understand how they work. The goals could of been somewhat different to the modern people, but you bet that if the flat stone is best option, they would of use a flat stone. At the end of the day the lives of people depended on cutting implements not that far long ago.
I guess it was more about the common folks. Also, a huge amount of old stones are not flat, but they were definitely used.
juice
Doesn't even buy knives
You guys need different avatar colours, looks like you're talking to yourself at first glance.
Maybe shades of grey would be better?
Oh man, he's gonna have a hard time reselling that knife on the internet after the way he wrecked that cladding.
But maybe he can get it all polished up good with that Okuda Shiro Suita powder he applied at the end.
But maybe he can get it all polished up good with that Okuda Shiro Suita powder he applied at the end.
