Sharpened Cutting Devices

[Will]

So I was watching an informercial the other day for the Miracle Blade Knife Set and I was thinking, what if Miracle Blade made katanas and stuff back in the day. I mean, their commercial claims it can cut through steel...so yeah, I bet back when samurais fought in full armor they could have used a Miracle Blade to slay their opponents.
No seriously, could a Miracle Blade Sword cut through armor?
or did miracle blade base their technology on the sword...

[Nanbanjin]

So I was watching an informercial the other day for the Miracle Blade Knife Set and I was thinking, what if Miracle Blade made katanas and stuff back in the day. I mean, their commercial claims it can cut through steel...so yeah, I bet back when samurais fought in full armor they could have used a Miracle Blade to slay their opponents.
No seriously, could a Miracle Blade Sword cut through armor?
or did miracle blade base their technology on the sword...
So called "miracle blades" are usually serrated. I don't think they can be sharpened if damaged.

[Musha]

Japanese katana are made by folding 100s of layers of steel, hand made and took a long time and energy to make. But I guess your miracle would be made of one layer pressed in a mould taking only a few minutes.

The Japanese also have sushi knives. But they are not made in the same way because they are not designed to cut very hard things and not made for battle :D.
There is also another problem that I have found with katana. I one bought an imitation katana one day and tried to do suburi with it then CRACK!!, the blade flew off and on to the floor :D.

[Nanbanjin]

Japanese katana are made by folding 100s of layers of steel, hand made and took a long time and energy to make. But I guess your miracle would be made of one layer pressed in a mould taking only a few minutes.

The Japanese also have sushi knives. But they are not made in the same way because they are not designed to cut very hard things and not made for battle :D.
There is also another problem that I have found with katana. I one bought an imitation katana one day and tried to do suburi with it then CRACK!!, the blade flew off and on to the floor :D.
I think good quality sushi knives are made in a similar way to katana. When I used to work in a kitched we had a sushi knife of "average" quality that cost JPY50000. It looked like it had been tempered in a similar way to a katana.

[Will]

But the miracle blade has a life time warranty

[hyouriittai]

But the miracle blade has a life time warranty

He's got a point, you know.

[Lonewolfandcub]

hmm miracle

[hobbit]

Last time I saw one of these ad's I thought the same - but it'd only work if the samurai made their armour out of empty coke cans . . .

[JSchmidt]

I've seen wartime propaganda movies where they use gunto's to cut through gun barrels. The blade was more than likely destroyed, but it did cut through it.

Jakob

[Hai_hai]

The miracle knife you speak of is just a re-named version of the Ginzu knife. It can cut through a tin can, a tomato and a shoe. Not a sword.

[Lloromannic]

The miracle knife you speak of is just a re-named version of the Ginzu knife. It can cut through a tin can, a tomato and a shoe. Not a sword.
They are different, my mum has the Ginzu set and my aunt has the miracle blade ones.

And Miracle Blade can cut through metal pipings and wood walls, and they even cut a pinapple in half in one cut while it flies through the air!!

Hah beat that Musashi!!!!